Whom is a Mary Sue

I think that SAM and Ryder (Alec more than either of his children) speak more to humanity being the Mary Sue than anything else.

An elite special forces commando, part of a renowned military unit that is feared across the galaxy is also apparently a genius when it comes to AI creation. And despite said AI research being highly illegal; and public enough that a civilian enterprise like the Initiative can find out about it; not one single person bates an eye.

This is the same setting where an entire species has been essentially exiled from galactic society for accidentally creating swarm AI, but all Alec gets is a little finger wagging along with a wink and a nod that he should keep working on his SAM project. And then, again being a setting that (rightly) fears the dangers of AIs, this civilian organization; run by humans of course; is all totally on board with using these hereto untested AI programs to run their ships, even having them directly interface with Pathfinders' brains.

No one bates an eye, not the Salarians, the Turians, and not even the Quarians, all are completely convinced that these human developed artificial intelligences wont try and kill all of them during cryo-sleep when every single other attempt at anything involving AI has ended in disaster.

And, of course, thanks to the superiority of human ingenuity apparently, the SAM programs work and don't try to kill anyone and end up saving the day.

If this was any other species, if the creator of SAM had been a Salarian or Asari, you can be assured that everyone would be questioning every little detail about these AIs, and they certainly wouldn't have been allowed to be anywhere close to being entrusted with the populations' lives like they were in ME: Andromeda. But hey, if the youngest species to enter the galactic stage says it's okay; and that species is humanity; then it most definitely is okay.