Yeah some amount of that is inevitable, but see e.g. https://hexbear.net/post/3820065 for an example of the type of content that you are "missing", being on lemmy.world that has defederated from hexbear. Also note how it's not just the post itself but how supportive of the position the comments are (overall), with several of them expressing an explicit desire to do such again, and the overall theme being how "funny" it was.

Now mind you, there is still a lot of similar content that you aren't "missing", from places such as lemmy.ml, but hexbear.net is most definitely a special place full of toxic trolls (many of whom continue to troll us after the defederation via their lemmy.ml alts, bc consent means little to them). Here is another example, this time from lemmy.ml that almost no instances have defederated from, since the admins are also the developers of the sourcecode for Lemmy: https://lemmy.ml/post/22043103. The cognitive dissonance is in full display on that instance by declaring that what the Western nations do is "genocide" (I mean...), yet somehow what Russia and China are doing is not genocide - either directly (Uyghurs & Ukraine) or indirectly (the USA has sent support to Israel, while Russia has also sent support to the other side of that conflict). Realistically, both the USA and Russia are supporting genocide, but NOT EQUALLY SO, as one of those two nations is also actively engaging in that activity directly.

Because of so very many posts from this, and toxic trolling from many of their users, I have gone to great lengths to find a way to block both hexbear.net and lemmy.ml, even switching instances to piefed.social that allows a normal user, without needing admin support, to block all users from any instance of my choice (https://piefed.social/post/307636 ). There are also some apps that can do that as well, though you won't find that option provided in basic Lemmy. I'm not necessarily advocating for such a switch, but it's nice to know that it's possible, and it is good to be aware of what content is out there and in particular note where it comes from - i.e. you may want to block at the very least communities such as !memes@lemmy.ml, if you don't enjoy having the above-mentioned content finding its way into your feed.:-)