An interesting question comes up with technology like Zipline: Where are they going to get all the savvy engineers to develop and improve such systems?
The FAA is determined to kill the R/C hobby. It is purposeful.
The Wright Brothers were hobbyists that tinkered with aerial toys, and eventually designed and built the first powered aircraft (with ZERO grant money, or government help). It is rocket hobbyists in Germany, Britain, and the US that gave us the visionaries that built rockets to take us to the moon. Young people in rocket clubs in the 1920s and 1930s became the rocket engineers of WW2 and the Cold War. Neil Armstrong and many other early test pilots and astronauts built and flew model aircraft when they were young.
The FAA, as usual, is short-sighted, and forgetting their mandate in favor of those with the most money. Promoting aviation is one of the main reasons the FAA exists - and yet they discourage early aviation education. Maybe if they thought the R/C hobby was "woke" it would be different.