They started off with Network Remote ID, and some countries are still going to go with that, but here in the states, it got shot down for logistical reasons. And when you think about it, if you're out in the middle of nowhere where there is no cell coverage, you most likely don't need to call in. There's nothing out there, but because they couldn't get network remote ID, they want broadcast to broadcast everywhere regardless. So, no it really isn't necessary to have network remote ID, there wasn't enough reason for it anyhow. It's another one of those bite my tongue to spite my face situations, as government typically doesn't use a reasonable approach to everything. They just want non stop surveillance on all activities all the time without a court ordered warrant. As if it is going to deter crime.
But Remote ID wasn't created with BVLOS in mind, and they need scrap remote ID until they get the security and safety actually into focus as the purpose of requiring it in the first place. It's a waste of money in the current implementation IMHO. The government has deviated from the rules to push more draconian measures.