Imagine having a personal assistant paid by a sketchy surveillance company. They can't do personal assistant stuff without full access to your email, calendar, etc., but the company paying them wants to harvest your personal data.

Personal assistants are realistic for very rich people because they can be paid an extravagant wage and punished for disloyalty. A personal assistant costing pennies to someone else, with access to data worth more than its salary, makes no sense.