Why are most people against long-distance relationships?

I recently saw a question and many people there said that it shouldn't take you longer than 1 or 2 weeks to meet with someone?

What if you feel a connection with that person, but they live faraway and/or don't have time to date, or don't meet anyone good, where you live? Isn't it worth waiting if the other person is unique?

Why are most people against long-distance relationships?
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