I struggle to find a use case for Spritz. If I am reading for pleasure I am reading slowly, savoring each word and I want to go at a variable speed say 300-600

I struggle to find a use case for Spritz. If I am reading for pleasure I am reading slowly, savoring each word and I want to go at a variable speed say 300-600wpm. If I am reading something where each word is not important, then I am scanning, reading a line at a time and getting 1000+wpm.