RF usage is governed by the FCC. Amateur Radio exists at the mercy of the government, and if there is widespread abuse or careless operation by amateur radio operators then that will likely jeopardize the continued existence of amateur radio.
Most people want their phone to work and other assorted things that use wireless signals. If amateur radio people piss off the general public these things will be stripped away rather quickly.
There is absolutely zero freedom of speech on using radio signals.
By the early 1900s, governments, militaries, and large business were using it for serious purposes. You can't have randos transmitting fake orders to a Naval base or fake distress calls to the Coast Guard. Imagine if some asshole in New York was screwing around on the airwaves in his shed and the land based telegraph stations couldn't hear the chatter from the Titanic and the relay stations sending the messages on. It was always going to end up regulated.
And at the end of the day people still buy baofengs and operate them at 5 watts on FRS and GMRS channels unlicensed all the time, I'm not set of any enforcement.