Please be serious, I never said that.
There is our own experience of the world, and there are other peoples' experiences. What we see and experience is to a very large extent influenced by what we believe to exist, by our previous experiences in life, by our attachment to views, etc.. If you have no attachment to views, you have no need to condemn other peoples' experiences of the essentially open universe so brutally or not at all.
Oh. I thought what you were saying is that we should consider that if a lot of people think something is true,
that maybe it is true
even if they don't offer any credible evidence for their beliefs.
Since I have never experienced a being who has lived for 20,000 years
it is rather hard for me to get attached to the idea that such is literally true.
I am attached to being open-minded, however,
and attached to the need for strong evidence to back up fantastic claims.
But getting back to the main topic,
a person certainly can believe, literally, that Buddhas live for 20,000 years
even if there is no evidence.
People seem capable of believing just about anything.
My understanding is that Buddhahood transcends all definitions of time and space as we would generally regard them,
for many reasons
and thus, something as specific is "20,000 years" simply doesn't make sense if applied literally
but makes perfect sense when understood metaphorically.