First, I am not a syndicalist, I know that is not important but I feel I should mention it, because as the meme goes, there is no one a leftist hates more than a sligtly difrent leftist.

I also never said "do not care about other issues" or "other strugles do not exist" I would also be wrong to say to disinvest from the suffering from others, however it is important to remember that 1) the primary struggle is that of class, and second most of those secondary and tertiary struggles, atleast under the status quo, can be traced back to the primary struggle, and that we cannot get a true and proper fix for them, or atleast it is significatly harder to do, if we do not work on fixing the primary struggle

Sexism is not solved with more female CEOs.

Racism is not solved with billionaire POCs.

Queerphobia is not solved with more LGBTQ+ media representation.

The primary oppression is of the working class, and being a member of any of these marginalised groups simply fast tracks you to working class.

That's not to say there aren't systemic prejudices. Of course there are. But these primarily serve to keep the group of elites small and ever more exclusive.