So if one guy isn't good enough, girls can just move on to the next guy.
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They can get a number of guys for a date, but chances are they'll not be attracted to a majority of them and then the rest they won't want to date if their decent.
If you're referring to something like how women get endless amounts of messages in online dating and such keep in mind a lot of those messages are a combination of "DTF?" messages and other "hi" messages and such. The guys are very subpar in quality.
So sure she "could" go out with those dates, but does she really want to? It'd be the equivalent of getting 30 messages a day and then looking at your inbox and seeing that 25 of them are over 200lbs and the rest are just not quite what you're looking for.1