I hesitate to go for another dip in the murk of tailing loop debates but.....
I too struggle to see how creep, in and of itself, would cause a tailing loop on the forward cast. OTOH I can see creep being associated with overpowering - dip in the tip and such. Symptom and disease thing.
I'm not even convinced that a bit of creep is inherently a bad thing. Given a choice between maintaining tension and eliminating any possibility of creep or line drop, I'll take tension. Talking in the field here, not the lab. Optimal v. Ideal.
If creep causes a tailing loop it should do it in both directions. Hands up all those with tails on the backcast.
Creep will only lead to a tailing loop if it reduces the casting arc beyond the minimum required to make the cast without the rod tip dipping below the straight line path.
People rarely creep on at the start of the back cast as they can see the line unfurling in front of them.
Plenty of people tail on the backcast, though they get away with it as you don't often see loops as tight on the back cast as you do on the forward cast so the rod and fly leg don't collide.