In theory perhaps but hardly in practice. It suggests that, as an extreme, Trump's politics are as correct anyone else's, which would itself be a nonsense.
Why? What is the standard against which correctness is to be judged? One might reasonably describe Trump's politics as incoherent, contradictory and stupid but that is different than saying they are in some fundamental sense incorrect, in the same way as intelligent design is incorrect or the belief that a cube is has 12 vertices is incorrect.
For me political systems can be judged as more “correct, more natural or more logical” from their results. That means analyzing how successful they are at addressing peoples’ most important needs.
But this is a subjective viewpoint of your own. For much of human history political philosophies were not judged in that way - it was regarded as correct that some have more power, more wealth and more everything that others - because they of their birthright or because it was best for society overall that those that 'deserve' the most have the most. Hobbes being a prime exponent of the latter.
That seems clearly more correct, more natural and more logical than the politics either before or since. There was of course poverty and wages were low but so were rents and other living expenses. It was hugely better for the great majority of people than what we have now, and so a better political system.
Again against what criteria? Why is a more equal society better or more correct than an unequal one? There is no logical reason to suppose so. You, and I, might prefer it but it is ultimately a subjective opinion. There is no science of politics. Attempts to 'prove' the correct ethical and political positions have done nothing more than reveal the proponents own preferences.
Do you have any evidence for that? Particularly the recent move rightwards seems driven in large part by the right wing media and by social media. The right has huge financial resources that just aren’t available on the left, and has a willingness to just invent and spread lies like wildfire would also seem to be part of their ascendency over the left: ignoring that would seem just as big a mistake. Along with the different factions of the left each having their own political theory with a seeming inability to agree on anything.
As has already been pointed out most people do not read a paper, there is some correlation between paper readership and voting but it is not deterministic (
as this polling shows), and as I already said if your theory held then how did socialist parties every begin in the first place when all the press was against them.
Culture is one area of the class struggle and it will be influenced by labour and influence labour, but labour is an active force constantly creating new arenas and self-organising. The working class are not just some passive body whose politics are dictated to it by the media.
I’d have thought if nothing else the left should be able to agree on an evidence based approach,
This is going in the direction of the silliness on the thread in theory where it has been claimed that the right are driven by emotion while the left are rational. It's a liberal canard.
And what evidence anyway? You have those prats like Torsten Bell and Hans Rosling taking an evidence based approach to prove that liberal capitalism is the best possible politics. Frankly anyone who says they are taking an evidenced based approach to politics I immediately mark down as suspect.
and that instead concentrating on the different approaches to political theory actually hinders that.
Well besides the fact that I like discussing and reading political philosophy, and posting on U75 is entertainment - understanding the fundamental principles of political philosophies can help one understand where the conflicts might occur and alliances might be made. Ellen Mieksins Wood's
A Social History of Western Political Thought provides a class based analysis of the development of political thought which contrasts with the liberal analysis, and that understanding can be used to inform political organising in the present. I don't refuse to organise with liberals, hell I spend a lot of my time doing so, but understanding the chasm separating their politics from mine helps to see where organisation is possible and where it is not.
The frequent cries of 'ideological purity' are 99% of the time actually noting of the sort, but a genuine conflict arising from different political philosophies.
EDIT: To expand on the last part. The liberal basis that your politics rests on has a conflict of left vs right, a conflict of values. But class politics (my politics) is based not on the values people hold, but on their interests, most crucially their relationship to the means of production. Workers may hold conservative views but they are still workers, my bosses are 'left wing' but they are still my bosses, still capital.
And understanding the different basis upon which those different political philosophies rest then helps explains why different approaches are taking to political organising, despite the similarity of some 'wants'.