I don't think you're saying it was but I'm quoting you because you said his name- for anyone who's thinking Kidd wanted this, he didn't. This wasn't a Kidd decision. Kidd loved Luka, despite his defensive liabilities. Kidd knows the value of a superstar. The Mavs board, and all of Mavs fandom actually, always roasted Kidd for relying too much on Luka. Kidd would get questions at his post game pressers "why didn't you draw a plan to scheme Kyrie open, why didn't you find an easier inbound, why didn't you try to find ways to get easier looks, what was the game plan?" and Kidd would say "Luka IS the game plan". To be sure Kidd got frustrated with defensive lapses and effort at times (as did we all) but Luka made up for it more often than not in the clutch.
I think Jason Kidd is a bad coach. Decent people manager and does well with personnel mgt. Good basketball knowledge. But he's not a teacher and a prodder like Luka needed. He lacks in that area and he can't outscheme anyone. If Nico was truly frustrated Luka wasn't listening to anyone about his fitness and maturity he should have gotten rid of the coach.