The problem with discussing capitalism is that the concept itself was (I understand) derived by Marx, who didn't like it, and imbued it with negatives. A more positive take is that 'capitalism' is a regulated market economy underpinned by democracy, the rule of law, freely accessable information and a belief in the value of people living their lives as they choose. It's a very successful system and over the last couple of generations has lifted millions around the world out of poverty. It might mean a smaller state than something further left, but it still involves in a bureaucracy to adminster the laws etc. To be honest, I prefer the label 'liberalism'. I'm not sure that a good many on the Left really get this, especially the diversity point: the left equivalent is a very limited, approved version of diversity based on ideology rather than individuals' private choices.
The alternative I see being discussed isn't communism, however. It's technofeudalism. That is, a very small number of obscenely rich people own everything and rent it to the masses. As we seem to be moving towards renting the right to seek work, find a place to rent, engage in the gig economy, even find romance, I can see the point that's being made. Trump and his minions are busily undermining the rule of law and democracy, spreading disinformation and creating hate.
Marx would have said that wealth being concentrated into fewer and fewer hands is a precursor to communist resolution becuase <Hegelian reasons> but history's clearly proven this wrong - the first Communist states should have been the UK, France or the US- not less developed Tsarist Russia.
I'm not sure what this has to do with the subject of this thread: I don't accept that men are inherently more accepting than women of material inequality. I think men are more likely than women to support Reform (and women more likely than men to support the Greens) is simply about self-interest.