"What kind of threat are they, then?" In almost every movie Peter can think of, almost any sentient artificial life grew violent when they felt like they were threatened. Sure, he couldn't speak for Ultron (the public never really got the full story on that, though there'd been theories on Reddit), but Vision wasn't a threat. Karen wasn't, either.

"I'm not saying that every android out there is peaceful -- that none of them are dangerous. Humans are exactly the same way -- some are dangerous and some aren't. Are androids in your world violent for the sake of violence or are they violent in order to protect themselves?"