Why do some men never commit and just waste a woman's time?

I know this subject may seem confronting to you but at the end of the day, I just date men and not women so I don't have the data to compare.

But can men please give me insight as to why you don't commit to a woman and make her happy if she wants marriage? And how come you waste her time?

Not an attack, just what it looks like to me that is all.
Why do some men never commit and just waste a woman's time?
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