Because perspective is a little hard to come by sometimes
Very good question. I wonder this a lot too. I think they really just don't know.
They sometimes reach out for something insignificant so as to distract themselves from what really counts or matters so they do not have to address what it is they're running from!
What's nothing to you may be something to them.
Do people do that? Sounds like an interpretation of values, to me. What is important to one person who might have significant depth and intelligence is not necessarily valued by another person who is shallow and a good-time Charlie. Takes all kinds to make a world.