Do people with PhDs in Physics know everything?
Is it possible for people with PhDs in Physics to speculate on things that they can't be sure of?
Does some of this speculation turn out to be wrong?
Answers on a postcard.
Btw "science is the new religion" is very true these days. A lot of people expect a certain amount of reverence be given to "scientists"... and this does in fact mirror the kind of authority the priest classes had years ago. Even the language of modern TV programmes is perceptibly deferential to anyone calling themselves a "scientist".
It's fairly easy now to simply have in your "documentary" programme phrases such as "scientists believe" and "scientists predict" and that's good enough. No evidence necessary; just pick some random guy who has a theory or a thesis, call him a "scientist" and label everything he says as truth.
Mainly it's because numerous people don't want to think for themselves. They previously relied on the priest classes to tell them what to think; now it's any random guy on the TV so long as the narrator calls him a "scientist". Could have a degree in gender studies for all we know