There are. Mastodon's problem (and/or best feature depending on how you look at it) is that it's pretty prevalent about their blocklists. So the most commonly federated and advertised places tend to be more liberal leaning. I don't keep close track of the community, but this is one blocklist that I just googled https://toot.cafe/about/more#blocked-instances
Aside from the obvious terrible shit the list itself looks kinda passive aggressive in tone
The more conservative demographic also has other more...professional(?) options in the form of Truth Social and Gab. At one point Gab was federated but got blocked into oblivion to the point where they decided to go standalone https://reclaimthenet.org/mastodon-blocks-gab/
It seems to me that for some it is enough that you don't block what they block or even ask someone why someone is blocked and voila, you are blocked too.
I absolutely see the value of blocking and there are things I am happy to block, but I have never seen the need to block anyone based on who they don't block.
It is kind of the outrage over Elon Musk buying Twitter: people are outraged not because they are blocked or prohibited from blocking others but because someone else might not be blocked by default.
Aside from the obvious terrible shit the list itself looks kinda passive aggressive in tone
The more conservative demographic also has other more...professional(?) options in the form of Truth Social and Gab. At one point Gab was federated but got blocked into oblivion to the point where they decided to go standalone https://reclaimthenet.org/mastodon-blocks-gab/