Because scientists want proof and facts. Also the very thought that we are on floating plates is a strange thought, in fact the original idea was mocked.
Just reread the text I'm sure you can find it in there. You are probably over thinking it. I know this isn't the awnsr you wanted bit you should do a bother activity to clear your mind and try again later☺
I believe the answer is: hindsight bias
Hindisight bias refers to mindset that make a person beleive that a certain event is predictable even if they have no objective measurement to make the prediction. Hindisight bias generally created by either memory distortion or self fulfilling prophecies.
He was responsible for proposing the three laws of motions