These are the same people who argue that almost everything is discovered but "accident". 90% of "accidental" discoveries I hear about is some scientist testing the assumed "obvious" case, and discovering it was actually wrong.

Some of the most revolutionary science discovery comes from research validating (and failing to) the "obvious" assumption.

And what does it add to say it's obvious? That we get to post ourselves in the back and say "I'm not a researcher doubt the actual work, but at least I knew that already"?