For a lot of usecases there is a strong 80% functionality. E.g. For Handbrake, 80% of the time I am reducing the size of my video screen grabs from my computer or phone. Don't need any resolution change, etc.

There are other times I want cropping or something similar, but it's really only 10-30% of the time. If people want to have a more custom workflow they can use an advanced UI