I don't think that's the same. I spitball crazy ideas, but my core knowledge/expertise is sound, and I try not to talk out of my ass. (Or I am upfront when I'm outside my area of expertise. I think it's important to call that out once your word starts carrying some weight.)
A product manager can definitely say things that would make me lose a bit of respect for a fellow senior engineer.
I can also see how juniors have more leeway to weigh in on things they absolutely don't understand. Crazy ideas and constructive criticism is welcome from all corners, but at some level I also start expecting some more basic competence.
In general there are so many different sub-fields of knowledge that it's extremely confining to stay in one area of expertise; the slow uneducated person that has been working to keep some giant build farm running and migrating projects and helping fix tickets for 5 years will have a lot of expertise you don't have if you have a more casual experience of the system.