Historically, the claim of consensus has been the first refuge of scoundrels; it is a way to avoid debate by claiming that the matter is already settled. “Michael Crichton”
Being a contrarian does make you an interesting person.
I thought you left? That was quick! Welcome back!
Historically... Really? Historically that's how it's been used....
Some matters are settled. For example, I don’t think any flatearthers deserve any respect for reopening the “debate” on a flat vs round earth. 🙄 The consensus that gravity exists is a good one. I would see a neurologist over a phrenologist. Etc. Some things just aren’t up for serious debate!
What you say is also true of scientific consensus. The experiments and observations can be replicated repeatedly which is what results in a consensus.