I happened to be in the car today listening to Ben Johnson's radio show and he was asked about importance of NIT games and he made it clear he felt it would be very beneficial for this particular team to play postseason games.
However, and to your point, he later talked in depth about how scared he is of not having enough time for the transfer portal stuff while they are playing in the postseason. He referenced a friend who coached in the Final Four and how they were freaking out about being so far behind because of that.
So, I think we both have a point, but I do say after listening to the coach, I think your point on portal stuff is stronger than I originally thought.
I still think it makes sense to play in the NIT, but maybe not as earnestly has I was before.