If she believed it was an option, I think she would. She'd be like "I don't have time to fall in love with me trying to get my restaurant. Just send a prince!"

I think she was smart enough to realize that there was really no way she could get close enough to a boy to fall in love slowly. Her stepsisters probably scared boys away from the house, and Lady Tremaine would keep her away from all eligible boys because her "darling daughters" were desperate. Plus, she's a dreamer- I think she'd love the idea that love at first sight was possible at all.

and Cinderella.

I think firegirl states the reason quite nicely.

i think ariel.

She sings about wanting true love at first sight.

and Aurora

and snow white

And Snow White