Earlier quoted context omitted.
I'm genuinely curious: why should contributors have to endure someone's toxicity if something can be done about it? In professional settings, I've seen colleagues get fired over bad behavior, and not for the lack of competence - and I can safely say the team's morale and productivity went right up each time. I fail to see how this couldn't be applicable to open source projects that wish to do it as well, as you'll ty…
And not even just contributors. Users of your project might not want to interact with your team. If I encounter a bug and want to create an issue, but I either see racism within communication, or just overall negativity in comments from members, why would I continue with your project? I could just as easily be subjected to it.
Because I have important stuff in my life that depends on it; business, workflows at work, IT infrastructure, ...