Yeah I mean you'd have to have some serious stones to not sign him. No one is gonna lambast you even if he starts to severely slow down or he starts having knee issues. But if you trade him you probably won't live to see the rebuild finish.
I honestly don't know if Giannis' game is going to age well. He is probably past his peak. Still an amazing player but worth a second super max? Not sure.
And it's not like their replacements were seasoned vets for the most part - particularly the receiving corps. If they don't get the penalty on the FG and get points in the red zone instead of the turnover...
The holding calls are a separate issue from whether or not he should be running kicks out of the end zone I think the risk/reward is worth it for a guy of his caliber.