where the committee perform worse because the "forced" member
Ah, the common strawman. A committee where everyone thinks pretty much the same is somehow better than one where a few have a different opinion?
Such discussions took place decades ago when pretty much every manager was only male. And they often honestly thought they did the right thing. When there were more women forced to be managers the group as a whole got better insights into different opinions. Which helped to see that certain things could be done a different way.
That to me is history, plus rather logical.
Having a few people with different opinions is further usually good for a committee. Though some like every single person to think the same, more efficient or something. If most think the same it's way easier to overlook something.