If encryption is allowed, then there can no longer be any restrictions on the use of ham bands - you won't be able to tell the difference between someone callin

If encryption is allowed, then there can no longer be any restrictions on the use of ham bands - you won't be able to tell the difference between someone calling for help or doing disaster relief and a pizza place using ham radios for dispatch. But to answer your question "who cares?", hams care, and I'd be surprised if people sending encrypted transmissions are not soon discovered - and if you knowingly violate the regulations, you run the risk of losing your ham license. If you're not licensed, (or even if you are for egregious or repeat violators), there are various enforcement actions the FCC can take including significant fines, equipment confiscation, and other criminal penalties.