It’s about power and control.
Do you think Loomis appreciated being cast as an accountant?
Sean’s protection was Tom - who nobody in their right mind crossed while he was alive.
What would DA do for the chance to be the Head Coach of a team with a playoff roster in a division that was in decline - for a chance at redemption? I suspect he would be easy to work with and flexible on his demands.
“Forced out” was the wrong choice of words on my part. More like forced to see the writing on the wall.