Ocon is doing pretty good @ Alpine to be honest. Gasly has been claimed by AT and it's said Marko won't let Gasly leave for Alpine, so perhaps they preferred GP winner Gasly, but if they can't get their hands on him, perhaps Ocon is the best next thing for their desires/demands.
I would concider Alonso is intended to be their 'star' or 'rockstar' driver. The Hamilton/Verstappen of the team, and Ocon the fast second driver. Ocon has outperformed Alonso up untill now, which is no mean feat, but then again is it fair already AND is it fair at all to be beating a guy who had a major cicle accident just before season start of which Fernando still is having a jaw/cranial (upper) metal plate mounted.
Either way, Ocon has definately performed well and good enough to merit a stay. Not that he has anywhere else to go i'd be inclined to say.
I also believe Alonso is waiting for the 2022 season. Let's see how that unfolds.
"Explain the ending to F1 in football terms"
"Hamilton was beating Verstappen 7-0, then the ref decided F%$& rules, next goal wins
while also sending off 4 Hamilton players to make it more interesting"