In Germany you'll get sued very quickly for offering others' copyrighted content, there's a whole industry there of lawyers mailing you that you've violated their clients' (copyright holders) rights but if you pay the around 1000 Euroes "damages" and sign a letter agreeing to not violate their rights again it'll go away. If they catch you seeding/uploading a part of another of their copyrighted content, then they'll ask for even more money.
So if you think seeding is the right thing, you'll probably end up really broke and unable to pay your bills there.
The other side of this are lawyers profiting off people who get these letters and charging money for basically copy-pasted emails on how to respond.
That's true. Putting tax funded research studies behind corporate paywalls also is in many contexts and jurisdictions. But it's funny how that one doesn't ever get prosecuted.