No it would not. Yes capitalism must go so do the colonial structures where it originated from. And yes current forms of discrimination interact with capitalism and our current systems and societies. How ever systems of oppression are far older than capitalism and it is at least my goal as of many other leftist mostly anarchists to have a society where hirarchies of opression don't exist.
It is my observation which is not representative obviously, that people who advocate to soley focus on class, who usually ignore the struggles of opressed groups in our society, often hold bigoted views about at least some minorities.
As in your case against people with mental illnesses autism etc.
Back to the previous point.
To just focus on class completly ignores the struggles and the contributions of movemtents that fougth and still figth for the liberation of oppressed groups. like black liberation and queer liberation. just as an example. These things are not distractions. Not only has there been social progress which bettered the lives of people, although that progress has always been a compromise.
In fact your are not going to get a true liberation from capitalism without overcoming colonialism which has also intersections with hetero-cis-allo-endo normative patriarchy, and those are also linket to capitalism. I could list more structures of opression.
Dismanteling capitalism wont solve all problems. It is however an important step towards a liberated world if the systems that follow it are better.
to your last sentence. Yes capitalist use bigotry to divide the working class and distract from the actual solutions to the massive inequality of capitalism.
I agree with that point My other commemt mostly refers to opressive hierarchies being older -for example patriarchy.