I agree with you. It doesn't matter though.
I think we can all predict the future here pretty easily. The instant this went into affect if anyone ever tried to create a rule (assuming it's survived court challenges, etc.) Apple would simply demand from its suppliers that they give them chips that DO NOT have FM radios.
It's not like Apple is hiding GPS functionality from users will relying on it itself, it's just a little thing that happens to be tacked onto the silicon. If the government tries to force Apple to do something they don't want, they'll just choose to buy chips without it.
At that point you're where the Radio industry tried to be many years ago where instead of asking for the thing that's on the phone to be turned on, you're now trying to mandate features into the phone to protect your business model. That's a very very steep slope to get support for.
Consumers are free to vote with their wallets, this doesn't seem to be a big deal to many of them. I don't think there's a clear public interest in requiring it the way there was GPS functionality to help locate people calling 911 for emergencies.
Even if the groups got their way, there are so many ways for Apple and others to wiggle out of it that I don't see how this would ever work.