This is such a double edged sword, and there is no way to know the right answer most times. I will use the NFL. Was peyton manning ready year 1 in the NFL? His 3-13 record and 28 INT's suggest he wasnt, but that seemed to have been good for him and prepped him for a stellar career. Tim Couch went 2-12 his first year and seemed to send his career into a spiral. Would Manning been as good if he sat 1 year, I assume so but you dont know. Would Couch have done better given a year to learn and not take a beating, maybe, maybe not but you will never know.
Do I think TT/Thiam needed to play more, yes I do, but ultimately none of us know the player and if that will help or not. I tend to think the only way to learn is to play, but thats not always true for every player, especially now where kids are coddled so there are times where if it goes bad they give up or get down on themselves. Maybe the next kid says NOPE NOT LETTING THAT HAPPEN AGAIN! and puts in more work to get better. That falls on the coach, that is to me the #1 thing Pitino was AWFUL at, there was no improvement from the guys who didnt get a ton of run early. You knew if we had a freshman on campus who didnt play, well thats 4 wasted years because they will never amount to anything. I honestly cant think of 1 guy who didnt play a ton as a FR who got better over 4 years under RP. As a program that seems unlikely to bring in a ton of top end talent, that has to be Ben's bread and butter. Guys like TT/Thiam/JOJ/Henley need to develop, and its up to him to know if playing or sitting them helps more over time.