You're being needlessly patronising, but I'll answer in good faith in case you are actually interested.

Ceteris paribus, reducing your hiring pool is a negative.

Can qualitative factors counteract that? Sure, it's possible. But there is no evidence for it here, only assertion. And the quantitative problem is very large, so those factors would need to be very powerful.

Aside from that, it's naive to believe that the qualitative factors will only work in the positive direction. Whatever is gained from excluding the wrong-thinkers could easily be dwarfed by legal or reputational problems, blowback from boycotts or other "cancellation", inability to address the whole market due to a lack of diverse viewpoints, etc.

So it is a matter of opinion then? Something that needs to be assessed? Where different assessment strategies can produce a different outcome?

No. The negative impact is a certainty. Any compensating factors are hypothetical and there’s no evidence for their existence or their impact pro or con. So in this argument, given what we know right now, they can be ignored.