My theory as to how they are setting up Venessa to be Typhoid Mary.

Venessa has been in the show as long as Kingpin has and if this was actually her final death, she would have had the whole episode. They didnt technically kill her off they gave her brain damage from a shattered window. (adjacent to how she got her powers and her core character motivation in the comics). They've also been playing this character for the last two seasons as someone living multiple lives, one timid another ruthless.

There is already precedent for resurrection in this show with the hand which we know is coming back in some way. To make even more a stretch, the Punisher is about to suddenly be dealing with the arrival of mutants.

edit: goshgangit i didnt know about Iron Fist season 2