Long sleeve undershirts

[frezer11]

In HS basketball, players may wear a long sleeve shirt under their jersey, so long as it conforms with uniform rules. In NCAAW, you may have a long sleeve undershirt, but it must be compression. I think I understand one reason why now. Doing a HS game last night, where A1 is just inside the 3 point line on the wing, and his defender B1 is in good position, with a hand up to discourage the shot. A1 raises for a quick shot, and while bringing the ball and his arms up, B1 gets a single finger caught in one of the folds of the regular, non-compression long sleeve undershirt. It clearly affects the shot attempt and a foul is call. Maybe you had to be there to see it, but its one where I have no doubt that if the kid is not wearing that shirt (or the shirt is compression), the finger either barely grazes or entirely misses the arm, and a foul almost certainly isn't called.

I don't know if I even have a question here, just an observation of a play that I hadn't seen before. Has anyone else seen this or have an opinion on this play?