I would use rate my professor to make sure that I didn't end up with an over-the-top difficult general class that I didn't really care about but needed to fulfill a requirement (Art history, public speaking, etc). That way I could optimize my study time to focus on in-major classes.

Small anecdote: I always did worse in college with professors or courses that were looked at as “easy” because I was not motivated to put in effort. Courses that were looked at as hard or professors that were rated as tough tended to make me “respect the class” and subsequently do better and learn more.

It all depends on your goal of going to college. Do you have ad-hoc self-taught and real world experience doing your major? Then you may just want a paper to show your employer. No clue about anything in your field and want to learn? Then having intense classes should be your end goal. Everyone has different reasons for attending college, at the end of the day a lot of students forget that they're only there for themselves and no one outside of their classroom will care much about what they did in it.