My heart says no and my brain think "Hmmm...max deal, huh? HECK NO!" That being said, for lower than max I would be ok with it but I still don't like him. At least Jet was a real Mav, Parsons is just a douche bag.
Take the word "max" out of the equation. People hear MAX and expect him to play like LeBron James or KD Harden. Is Parsons worth $22m/yr, in THIS free agency market? Absolutely.
Hate the way he handled leaving, and the way he acted, but man if he could stay healthy I would in a heartbeat take him back, but I don't think he will ever stay healthy.