It can, and it can also harm it. If you reduce your quality bar to fill a quota for a group, then that group can end up having a lower quality than the majorit

It can, and it can also harm it. If you reduce your quality bar to fill a quota for a group, then that group can end up having a lower quality than the majority group, which then works to reinforce bad stereotypes in some of the majority against that minority. That can then harm those in the minority group who were in fact above the bar and for whom the bar did not need to be lowered. I'm not against quota systems but they need to be aggressively monitored so you don't get unintended effects.