Hooking a power source to an infinity stone and causing it to discharge powers seems like it would be something that advanced technology could duplicate after it was seen to work.
In most other instances, tampering with a stone like that -or even so much as touching a stone- kills pretty much everyone else. But she survives because
To be fair that should also be true of radiation and a bunch of other things used in comic movies, but it seemed a bit forced in how it was presented in this case.
As far as the Kree conditioning, my perception was that it was a somewhat lazy exploration of gender stereotypes:
•Emotions bad
•Women are emotional, so you suck
•repeated flashbacks and events to show how virtually every guy she had ever met was toxic
•...wait, your emotions are actually the thing that makes you better, and all the military training you had before was wrong
I found the movie to be a weird contrast to most everything else being put out at that point. In a lot of ways, the movie seemed intentionally designed to go against most of what had been established about the setting by other movies from the phases leading up to Endgame.