If Hamilton wanted reds, there was nothing preventing him stopping for them. He would have been behind Max on new tyres, with Max on worn ones. The reverse of what happened.
Danger was that the race would finish behind the safety car, and Lewis would have thrown away the win.
Its normal for ALL lapped cars to be allowed to overtake the safety car and unlap themselves, and this is NOT what happened. In order to save time, and allow one racing lap, just the ones relevant to the title panel did so. The ones that didn't overtake were running 12th position downwards, so would all have had no chance of moving up to even one point in the one remaining lap.
Unusual and controversial, maybe, but Massi owed Max one after the ridiculous first lap decision.