You can get 4% from a high yield savings account. That's insured. That's still $360,000 a year (taxed as income). You don't need to expose yourself to a lot of markets and "down years" . I mean, if the us government collapses and insured accounts are lost we all have bigger problems.
At 2.5mm you'd still be fine at 4%. Six figure salary for doing jack squat.
Of course, not everyone can budget and they might burn into their principle. But, like, don't do that. 🤷