Thus, anti-money laundering do not solve or prevent any crime (crime has already happened).

Sure, but "follow the money" can be an incredibly powerful tool for criminal investigations.

With over reaching AML regime there is a danger that it is used against political opposition, like it is already happening.

That's a concern I definitely share. I think there needs to be a push for a privacy-preserving middle ground between the complete two-sided anonymity of cash and some cryptocurrencies on one side, and the data privacy nightmare that's traditional electronic payment methods.