I agree for the most part. That being said, I have noticed more senior engineers will grow resentful and bored if they are assigned very basic tasks, while a more junior engineer would be thrilled.

Senior engineers should be mentoring junior engineers, and the general talent and outlook of the team should match the problems being solved. A senior person at one company might seem more like a junior at another. It's important to be honest about those kinds of realities I think. Transparency leads to the longest lasting and most harmonious organizations.