Well yes, but it is thinking from the other end, usually. The reason why companies may benefit from inviting a designer is that a good designer may both aesthetically and functionally take an entirely new approach from scratch, that has the end user in mind.

This is something certain types of companies and organizationa fail at often, because their daily involvement makws them hyperfocused on certain aspects while they are blind to entire classes of solutions.

That doesn't mean designers can be sprinkeled on every project and drive an evolutionary leap, but it can be a way to explore the solution space.