Shutting off my electric water heater on the warmest days when there is a high electric load due to air conditioners has never affected my comfort level to any perceptible degree.
I’ve had this setup for over 20 yrs.
How much do you think your hot water heater actually runs on hot days? Probably next to nothing.
There’s a difference between shutting off your hot water heater and shutting off your a/c.
You probably won’t notice the former but definitely would notice the latter. These aren’t hot water heater controls they’re forcing on people, they’re thermostats. Imagine you’re ill with pneumonia and the city cuts your heat. Or recovering from surgery and find you have no a/c when the ambient temp outside is 100.
I say, move south young man! Live without a/c in the deep south. In August. Prove your merit as a human! Box fans only allowed and all the cold running water you like!