It's amazing how many people will believe anything they hear or read on the internet.
True, the 1% is pure BS, but amzingly, many people act as if they don't even use that much. At least not in the critical, problem solving area.
So, how much of our brain power do we actually use? nearly all of it according to Scientific American: https://www.scientificamerican.com/article/do-people-only-use-10-percent-of-their-brains/