Exactly. VG
For me its like questioning a player's work ethic for not becoming a better shooter to me. Plenty of guys bust their ass trying to improve their shot, but they just aren't talented shooters and never become shooters. (Rondo for example genuinely improved over his career but still isn't a shooter at all)
The only areas I really feel justified in criticizing players for effort is what you see the court and physical fitness/weight. You don't know what level of pain, what level of damage, and what sort of treatments they endure to try and play. Pretending that you do know is silly.