Why are some older unmarried folks so picky?

I've seen quite a few single 38 yr old guys who are still so picky at their age while they complain that everyone is married with kids at their age. Do they realize that dating options will decrease as they get older?

Or is it the sense of entitlement the same reason why they are still single at the late age of 38?
Why are some older unmarried folks so picky?
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