Just because a writer writes about a “mountain” doesn’t mean that writer has ever been to that mountain, or that the mountain even exists.
Writing =/= truth, reality, etc.
Someone can write, “hilarious”, and it doesn’t then prove what was said was funny, let alone that they even laughed.
Interaction here on the internet may “seem” like actual, genuine, human interaction, but I promise you, it is not. No matter how sophisticated and convincing the signs and symbols are made up.