I would bet a million dollars that he doesn't know what a Mary Sue even is or what sexist means cosidering how he's using the terms.
Seems like it, he put an internet definition to try to cover it, but kept the idea that is all sexism
Mary Sue: An excessively idealized woman character with no notable defects that gets all the attention of the story and is usually overpowered or more skilled than the rest of the characters, usually is an idealized alter-ego of the author which most of the times is a woman. When men characters follow this pattern they are called Marty Stus, a term that is almost never use for mysterious reasons that can be blamed on... Sexism: Discrimination based on a person sex or gender.
Yes Mary Sue are women... Men are Gary Stu, your point?
duduspace11 "Well, since we are estimating costs, Pokemon Red/Blue did cost Nintendo about $50m to make back in 1996"
Mr Puggsly: "Hehe, I said good profit. You said big profit. Frankly, not losing money is what I meant by good. Don't get hung up on semantics"