Why are men more picky in committed relationships and women more picky in hookups?

I've read this in numerous places now. How apps like Tinder show that women are more picky with hookups than men are, using the statistics on how women can get hundreds of swipes to the right while men struggle to get 10. When she swipes right, a woman is nearly 20x more likely to get a match than a man is.
But, when it comes to an actual committed relationship, that turns around completely. Men seem to be really careful about the women they get into a committed relationship with. In surveys done, men were shown to be more likely than women to say that they haven't found the right one yet. Men are also increasingly less likely to enter into a long-term relationship and also to ask a woman to marry them.
Why are men more picky in committed relationships and women more picky in hookups?
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