DMCA isnt just piracy, its copyrighted content. There are piracy communities that discuss piracy but dont provide links to the actual content (if theres some that do that link me them and ill deal with them).

Its a gray area in the US (with certain states banning it themselves) and things like the PROTECT Act existing (which is added on to the miller test, it has more than just that to follow) and due to that I would rather err on the side of caution

For a lot of those communities there are alternate communities in other instances (e.g. lemmy.world has a bigger touhou community) or separate accounts can be made