Why do some people ghost even after few dates and can't communicate like adults?

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Basically I [M28] started dating again after being cheated on in my previous relationship.
I dated several girls (they are either mid 20s or late 20s) and went on couple of dates with them.
All of them seem to check all boxes that I look for in a partner, but after a few dates they seem to just ghost me. For example latest girl I have dated, girl in mid 20s. We went to 2 dates, kissed on 2nd, everything seems ok, but then she just disappeared. I understand that she is not interested...
Why do some people ghost even after few dates and can't communicate like adults?
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