“Only because you can buy 20 Blackhawk helicopters for every V22.”
A few V22s might be able to offer a military advantage that makes it worth that much. Or that was true when the aircraft was put into service. Now, with all sorts of unmanned aircraft, it might no longer be true.
I can see where the V22 would be a more complex thing to keep stable, and more complex in general than a helicopter.
It might stun you to learn that the U.S. Army just chose the Bell V-280 Valor as the next generation replacement for the UH-60 Blackhawk.
