Not sure how anything ever could ever even come close to defying logic regarding movies with a big green giant running around trading blows with a god from another planet who can control lightning. Nevermind the fact that you have Thor Living with a man made up completely of Rock and oversized maggot 😳. Oh and lets not address EGO the living planet. Regardless of whether banner knows his blood is "Gamma" radiated, I'm sure if he was faced with either saving his cousin or allowing her to die he would take the necessary actions to save her. He would also know since they share similar blood/blood type/blood line she may also be able to withstand the transfusion and the radiation. With that in mind, she's going to die anyway, might as well try.
I personally think you took my rebuttal a little seriously, but that's cool.
Also there have been a lot sections that match how the hero was born. Captain America was a pretty dang accurate to the comics, Thor well is a god and was born that way, Banner explained how he was caught in the bomb. Iron-man was pretty dang close. While not being a hundred percent faithful to the comic their adaptation are not so stark from the source material. If anything I would say they take a lot from the 616 and implement a what they need from the ultimate universe.
Leaping takes time, once you leave the ground he has no thruster or boosters to increase his speed or slow is impact to the surface.
Now Using real life logic in a comic book movie is ridiculous, but if he was only to jump upward to a higher elevation that would be the only way to secure anyone's safety if he were to jump a couple miles in a single bound any non enhanced individual would die on impact. Hulk would have reached maximum velocity on his way back down and killed the injured party.
Now lets take in to account that Bruce is a certified genius. A medical office right across the street is vacant. If someone is on the brink of death, seconds matter and if bruce is in hulk mode i'm sure he lost his cell to locate a hospital... and when he does it only has a 2 star rating. Mind you cell phones weren't really a think during the creation of She-hulk.
Make a she-hulk or She dies for sure... Simple choice.
This defies logic.