I’d wonder if the existing amateur presence would make the bands hard to sell for “pollution risk”. There’s a lot of kit in circulation, and getting it off the market, including secondhand, would be difficult.

Yeah, they could blow a lot of time and money on FCC enforcement, but it feels like trying to unring a bell. As a telecom, would you be willing to pay for (for example) 148MHz on just the promise the existing users were displaced on paper? That doesn’t mean much when some untrained/curious person finds kit at the Goodwill and tries it out in the middle of your service range.

Of course, obviously fight for every nanometre of spectrum, but that’s probably a legit argument against reclassification: all they’d get is damaged goods of low resale value.