That doesn't even make sense, lol. Atlus is writing the sequels referring to the P3 MC as a "he/him". The path that Atlus follows is the only canon path. It's as simple as that.

Neither my Dragonborn nor yours is official canon, until the creators reveal which path is the canon one. And if they never do, then there is no canon path. The concept of "multiple canons" doesn't exist, nor would it make any sense.

Also, just because you can do something, doesn't make it official. I seriously doubt Cloud was wasting his time racing chocobos when meteor was about to fall. lol