They also care about squashing competition which prevents many apps like real web browsers, game streaming and alternative stores which can not pay the 30% fee.

IMO its fair for the app store to remove whatever it wants but there needs to be an escape hatch where apps blocked by apple can be manually installed. Since the API apps have access to is secure, this should not be a significant issue.

Apps like Parlor may be full of ToS violating content but users should still be able to sideload the app and the government should be the one to shut them down if the content is illegal.