Ehh...RawTherapee (and also Darktable) are certainly capable of editing, but I've found that in practice they require far more effort to get results comparable to Adobe or Capture One's RAW processing.
I think it's a great example of the phrase "took many cooks in the kitchen spoil the broth". For any given editing task you want, there are like 5 different modules that all do basically different variations on the same thing, and each one has quirks that presumably only make sense to the original author of that module.