Could you explain and quantify precisely what this 'discomfort' is please?
I think I've done enough explaining. As for trying to "quantify" the problem, it would be an absurdly reductionistic approach to an issue that is subtle yet undeniably real.
So far, it's seems that your comments are based entirely on your personal aesthetic tastes, because this thread remains extraordinarily light on actual evidence of the 'discomfort' caused by someone quietly enjoying a drink on the tube.
I have an instinct and concern for the comfort of others which is shared by few here but many in the rest of the city. It's a pity you're not one of them.
Of course, these is a minor problem with drunks on the tube, but - as been stated several times - the vast majority of them are already p- before they get on the tube, so the ban won't make the tiniest bit of difference.
Not so. Someone that is already very drunk and being disorderly would presumably be refused admittance to the train where enforcement were possible.
However, a person already quite drunk who proceeds to drink more will, inevitably, become more drunk. At some point they may well cross a threshold where their behaviour becomes not just unpleasant but actually threatening or violent. I'm sure we can both agree it's desirable to minimise the opportunities for that happening in a confined space where people cannot easily escape and help is not easily summoned.
In essence, we have a choice to permit people to become
more drunk (however drunk they were to start with), or to mandate that they become
less drunk by taking a pause in their drinking if they've already started, or to
defer their drinking until after their journey if they haven't yet started and start it in a more appropriate place.
I know which of these makes the least sense.