Is being selective another reason for not finding commitment from a man?

I've been on dating sites for many months now. There were 2 guys that claimed to be looking for commitment and forming a family too. They both said we can date for only 5-6 months and base on how it goes, then we can have a family.

The only issue:

Both were unattractive guys with indigenous features and lower quality overall. I turned them down. I just wasn't attracted to them. Both seemed like desperate types with few to no options.

I've been told several times by friends that being too selective is a reason why I continue being single, that I would've already had a family if it wasn't for that. Is that another reason too? I can't help it if I'm not attracted to the man.

Is being selective another reason for not finding commitment from a man?
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