I don't know about all that, and I'm not in love with bringing in Marte (although I certainly don't hate it) but he adds more value in other ways that Pete alonso does not, E.G. defense, speed on the bases.
Higher OBP
Higher AVG
Higher walk rates
lower K rate
While Marte has had a few below average season he's either been average or plus at 2b most seasons while Alonos has been an absolute horrible defender.
Literally the only thing Alonso is better at is hitting Home Runs, and it's not like Marte doesn't hit them as the last 3 seasons he's hit 28,36,25.
Again I'm not the president of the Marte fan club but he's definitively more valuable than Pete Alonso.