Because having to ask suggests that the AI didn't already do it for you pre-emptively.

If you're not yet waking up to AI completing tasks for you that you didn't directly ask for, you might be falling behind the curve. A good personal assistant does what you ask, a better personal assistant knows what you need before you do and has it completed before you reach your desk. AI is already starting to reach into the latter category.

(edit: dialled back some unnecessary snark.)