People need to be free to be how they like. e.g., if a mod is forced to have to read constant Russian (or Chinese, or Israeli, or American, or UK or whatever) propaganda with horribly offensive active disinformation, then likely they will quit being mods. I'm not saying they are holding their efforts hostage to their preferences - but I'm not not saying that either (it is factually accurate if unnecessarily adversarially phrased), just saying that it's the normal default of the world and we would do better to bow to natural principles than to wish and hope that things were not that way.
It is really, REALLY hard to find common middle ground - and sometimes it cannot be done. Echo chambers are a natural result of how people with opposing viewpoints choose not to tolerate one another.
Intolerance is uniquely important, bc being intolerant to intolerance is not the same as generalized intolerance!!! In fact, the opposite is true: anyplace that is even somewhat vaguely neutral towards intolerant behaviors, in general, will quickly become intolerant overall. Imagine a room with screaming toddlers - those who scream loudest get noticed, and the behavior spirals forward feeding off of the other behaviors to become more pronounced, not less so. A space quiet enough to be heard is not normal. Entropy must be fought against if order is desired. There is a balance somewhere between letting toddlers do nothing at all fun, vs. letting them do whatever crosses their minds at any given moment, thus inflicting their tendencies upon others nearby.
Take Chapotraphouse for instance: I would not dream in a million years of trying to shut that place down. Maybe I should? But I don't. That said, neither do I want to go there, and the Fediverse would be a much more welcoming place overall if it would warn people about what goes on inside of it. If they are willing to be fair-minded, they could even contribute towards writing up the content text of such a warning? They should not be solely in charge of that endeavor, ideally, yet neither do I see any legitimate reason to lock them out of such a process?
I don't know how the Fediverse expects to survive when we mix together the equivalent of 4chan and Wikipedia, but don't label any of it, and then try to get people to come and enjoy their time here. Especially with it being so confusing - e.g. was a comment removed by a community mod or an instance admin? (fortunately v0.19.4 looks to entirely solve that latter one, yay dev efforts on that one - they really do so much for us all, for free!:-D)
Note I am not advocating for a common middle ground here - I do not believe such exists (e.g. if someone wants to make fun of me, but I don't want that, why would we presume a "middle ground solution" should be the default?). I am rather advocating for labeling things what they are. Imagine going to a website to watch videos, but some videos are porn and your friends are all prudes, or moreover let's even imagine some are nonconsensual pedophilia - will you send them there? Sending people to Chapotraphouse, or a place that federates with it - crucially: without labeling it - is like that.
Some places on the Fediverse are like porn - they are (/ may be?) fine to exist, but are considered offensive enough to need to be labeled, if we want to reach out to a more common audience (of e.g. non-Arch-Linux users:-). And then yeah, label Lemmy.World as likely to remove content that goes against Western standards? (Except you picked bad examples imho, being community mods rather than instance admins) And do similarly for Lemmy.ml as well - again, hopefully with their own participation in writing up that label?