Lots of people would be surprised. Because they aren't educated about how these things work. I'd wager that project managers working on these teams also don't

Lots of people would be surprised. Because they aren't educated about how these things work. I'd wager that project managers working on these teams also don't have the understanding (let alone intuition) to judge whether these risks are present, and so will continue fighting for it. The wager is based on the presumption that someone who did understand these risks would pivot or otherwise not allow this initiative to continue. PMs fight so hard because from their position their job is at risk if the project takes a nosedive. But they don't know what they're advocating for a lot of the time. I know quite a few folks like this in FAANG and adjacent spaces.