You're assuming they can afford an instant pot. Those are kinda pricey (getting cheaper though). And not all models have delay timers (mine doesn't). Also, even them having electricity is an assumption that may not be true.
However, I don't buy the door dash story because if one "can only afford cereal" why would they be able to pay the doordash fee.
I'm very lazy and I stopped using delivery apps awhile ago because the fees were ridiculous, easily costing as much as the food itself.
As an aside, the instant pot does make my life so much easier, even without a delay timer.