It would be hilarious if it weren't so tragic. This is the mindset that elected Trump, and may yet do so again. i.e. what you say is not half as relevant as who is saying it - e.g. genocide done by Russia or China is perfectly fine - and they cannot begin to see the flaws in that line of reasoning.
But... historically they helped fund the creation of Lemmy, so... I guess genocide done by Russia or China is perfectly fine after all, at least fine for them to say, and for their posts to show up in everyone's feed by default. Or if they are somehow "not fine", then I see no functional difference between how those two extremes are treated.
Tbf, people are trying to improve things, slowly, over time - e.g. the instance admin of sh.itjust.works said that they would automatically user block hexbear.net for all newly created accounts, then send them a PM explaining the process to unblock them. I don't know if that's implemented yet, but that's awesome! Really it harms nobody's ability to read whatever they want, but makes going to such places as Chapotraphouse be opt-in rather than out, which seems to match the preferences of most users of the Fediverse - though as you discovered, not all.
I suspect that when they notice that a substantial proportion of their moderator actions must be taken against people who choose to remove that block... perhaps they may reconsider their position on the level of the entire instance (for the same reason that US anti-terrorist agencies are far more worried about domestic than foreign actions for the last several years - bc if "winning" is literally the only thing that matters to someone...). But that's their business, and anyway the user block solves a great deal of the problem in the short term, so I for one was ecstatic to read that. But, that's just one instance, and there are hundreds if not thousands more.