While I have no doubt at all that competitive shooters long ago figured out that properly FL sized ammo is more accurate than neck sizing, a whole bunch of regular folks neck size ammunition and it's really not a functionality issue if done correctly, any more than FL sizing is.
Still happily answering to the call-sign Peetza.
The problem, as you so eloquently put it, is choice.
He is no fool who gives what he can not keep to gain what he can not lose.
-Jim Eliott, paraphrasing Philip Henry.