The tax authority in my country already uses a proprietary protocol and client

https://de.m.wikipedia.org/wiki/Elster_(Software)

Doesn’t work. It’s possible to let many banking apps think they are running on a normal device although it is rooted.

Just don’t use the services that do this

I use the Library or libgen

I went to university but never had to buy a book. My university library offered all the books I needed and an online access to research articles by Springer, Elsevier, and so on. You can get access as a regular person without being an enrolled student.

Did you pay the author of every book you read?