Which are only blocked if the admin specifically asks for them to be.

In other words not hard-coded at all.

PieFed is quite opinionated, and the instance picker even more so, but the "hard-coded" arguments have long since been debunked (though last I checked, without being acknowledged by those who initially spread the story).

Also the flagship instance PieFed.social does block a lot, but that's as different as an instance is from software. Btw Lemmy.ml rather famously blocks a lot of content as well.

Whatever software you use, pick good instance admins that you feel reflect your values (or even self-host your own), and you'll enjoy your experience on the Threadiverse much better than being at odds with them.