I know many such cases! It all depends on the person... But in reality, such people usually change their views later... Disappointment...

But you can be disappointed in anyone. For example, you meet someone through friends, and you see this guy who seems almost perfect – attractive, funny, sociable, without any flaws. But upon closer acquaintance, negative qualities will inevitably emerge, or simply qualities that you cannot tolerate.
Whether there will be a mutual adjustment is not obvious. But in any case, both virtual and real communication begins with a somewhat embellished image. No one rushes to reveal all their flaws to the person they like.