How do grape farmers decide whether they sell their grapes as regular grapes, raisin grapes or wine grapes?

I don’t know the answer, so I’ll just post this screed from the terrible film “Psychos in Love”.

I hate grapes! I can't stand grapes! I loathe grapes! All kinds of grapes! I hate purple grapes! I hate green grapes! I hate grapes with seeds! I hate grapes without seeds! I hate them peeled and non-peeled! I hate grapes in bunches, one at a time, or in groups of twos and threes! I fucking hate grapes!