Sorry, but reading both those posts either my reading level is too low or you are contradicting yourself. In the first post you clearly say that now 7d2d is NOT a tower defense game. In the second post you clearly say it IS.
Your main point is the advertisement though. Lets look at the top of the steam page: "open world ... combination of first person shooter, survival horror, tower defense, and role-playing games. Play the definitive zombie survival sandbox RPG that came first."
Both mentions of survival narrow the genre down to "survival horror" and "zombie survival". Whatever you think about the genre "survivial", what is the definition of "survival horror" and why shouldn't 7d2d be one?
There is a game in a spaceship where you hide from an alien you can't fight and try to find information:
https://en.wikipedia.org/wiki/Alien:_Isolation . It is called a "survival horror" game in the wikipedia page, but I don't see any hunger management, no temperature management, no farming.