IFF Non Call

[emaxos]

Watching 14U Rec game. R1 and R2, 1 out. Batter pops ball up between pitcher and F4.
F4 makes no move on the ball and pitcher makes a nice over the shoulder catch.
No harm, no foul.
Defensive coach asks, "wasn't that an IFF"?
PU says no - in his judgement ball wasn't catchable.
We chatted after the game.

Question I have is, should the competence of a fielder be considered when judging the IFF?
The ball clearly could have been caught by F4 with ordinary effort but she just froze on it. That was a factor in his judgement of "uncatchable".