[TulliusCicero]

Yup, exactly. To add onto this, for people less familiar, there's a non-stupid reason for this: economy of attention.

Attention/APM is often called the "third resource" (after minerals and gas), spending it wisely when you have several areas at any given time that could use attention is part of the strategic and tactical decisionmaking. For example, usually in a battle you wanna be paying most attention to the fight rather than your base, but sometimes it's actually better to jump out back to your base to increase production or economy, and knowing which situation is which can be challenging.

Obviously, if you make the game mechanics too easy to control (letting the computer do more of the work), then this part of the game becomes less interesting, because you don't have to weigh trade-offs as much anymore.