Not IMO. I don't see a need to gatekeep the definition of a "heist" as you do. Heck, even the "Ocean" movies trailed away from making the heist simply about personal gain. There is no problem with running the type of heist you want (and many of the Adventures in Golden Vault can be run that way), but it also perfectly legitimate to run a different type of heist.And is a different genre.
I'm not trying to yuck anyone's yum here, but heist adventures aren't just about the actual structure of the adventure, but the nature of what you're doing and why.
Ocean's 11 = heist
Mission: Impossible, although similar in structure != heist