Mar·y Sue [Mary Sue] NOUN (originally in fan fiction) a type of female character who is depicted as unrealistically lacking in flaws or weaknesses.
https://en.wikipedia.org/wiki/Mary_Sue
"A Mary Sue is an idealized and seemingly perfect fictional character. Often, this character is recognized as an author insert or wish fulfillment.[1] They can usually perform better at tasks than should be possible given the amount of training or experience, and usually are able through some means to upstage the main protagonist of an established fictional setting, such as by saving the hero."
One the male side we have "Gary Stu". My favorite example of which is Doc Savage.
Anyway, neither is bad in and of themselves. So what if Burnham is a "Mary Sue"? Men have been and still are allowed their "wish fulfillment," why not provide women with an equal opportunity for release? Perhaps the term should be banned here as it seems to be code for a misogynistic POV. Burnham is no more or less a "Mary Sue" than Kirk is a "Gary Stu." If women and girls draw inspiration and strength and a confidence from the "Mary Sue" known as Michael Burnham then that's great!
And that should be the final word on the matter. Well put.