[stephen_g]

Well yes, they are actual real risks - a badly thought out law can literally make it illegal for a device to allow an adult to, say, unlock a device's bootloader to install open source software (EDIT: this example was in my comment before the OP edited theirs to add it there as well), because the device vendor can't guarantee that it will comply any more.

I don't think anybody is actually opposed to parental controls being mandated to ship in commercial operating systems, as long as it doesn't restrict the freedoms of adults to completely disable them or to install software that removes them or doesn't have them. The problem is when these features are forced on adults and restrict devices or computers 'just in case'.