just two things on that. I generally sort of agree with you, would just squew your remarks this way. in my opinion,the first thing to realise if they don't consider the rest of the revolutionary left, the working-class. The rest of the revolutionaries left may may not be working class people, but that is not the focus of the SWP when they talk about working class. Rightly or wrongly they consider those Workers with what Trotsky called capitalist workers party consciousness, to be the working class. Their entire focuses upon these people, mostly with little regard for the rest of the revolutionary left.
it's not so much the don't think anybody else has any answers, it's a matter of once they have an answer, they go for it with everything they got and learn whether answer is right or wrong through practice.Democratic centralism.the above sentiment comes into again. There is no point in the left endlessly debating the merits of each case, better just for each group to compete so to speak, and see which methodology is successful. Diversity is a good thing, but it has to stand on its own feet and and win the fight for existence, in a kind of natural evolution way, if that makes sense.
So when you say, we just don't know what is good for us, it depends who you mean by us.