You don’t understand his contract. It is not guaranteed that he goes back to the NFL, sure, but is also most likely.
Per normal, it is you who has the comprehension issue, as I have repeatedly explained to you the scenario for him going back to the NFL.
I’ll break it down to you like you’re five:
1) CU’s ONLY incentive to give him the buyout up front is if he takes a big discount - millions of dollars. Otherwise, the entire amount can be paid to him in the same installment period of the original contract.
2) Dorrell does not want to do any favors worth millions of dollars for a place that he believes unfairly fired him.
3) In order to fulfill his end of the contract and get his money, he has to take a job. The job that he is most likely to get again is NFL WR coach.