It’s accelerating towards Mach 10 in those last 14 seconds, so what, the cosine of another 10-15 miles?
It retraces the path by using three engines with 144,000 pounds of thrust to impart horizontal delta-V to a nearly-empty stage that has a 30:1 gross-to-dry mass ratio.
And the expendable Falcon 9 can get nearly 29,000 pounds to LEO, not 5,000 pounds, so accepting your range safety assumption you’re down to 14,500 pounds to LEO, but without having to trash millions of dollars worth of equipment. So you’re in the same ballpark as the Antares or Soyuz-U throw for tens of millions of dollars less money, and you still have enough throw to get a crewed Dragon into orbit.
I’d pay to sit in the Range Safety meetings that address the return and landing constraints.