I have replaced fuel pumps. This involves a lot of work and often a specialty wrench. You will usually need to drop the fuel tank, which requires at a minimum raising the vehicle over 18" into air. The standard 14" jack/stands solution most motorists own is insufficient. They need to be replaced mostly because their integrated fuel filter gets clogged by the sediment accumulated at bottom of the tank, which causes the motor to fail. When the tank has plenty of fuel, the gunk at the bottom of the tank is less likely to be ingested by the system.

This is in the same territory as the advice I see sometimes to make sure you don't turn the steering wheel while the car is stationary ("dry steering") because "it will put stress on steering components and shorten their life, and it will damage the tyres".

These pieces of advice are technically correct but catering for edge cases that won't affect 99% of drivers/vehicle owners. Modern cars are designed for the way people use them; people run their tanks to empty all the time.

For my car, the pump assembly is $900. And then there's the labor charge to put it on a lift, drain out whatever fuel is in there (saving it for later), dropping the tank, and then to remove/replace the bad pump. I would guess an easy 3 hours labor.

With the average used car on US roads now over 12 years old, having the pump go bad could mechanically total some vehicles (the repair cost would exceed the vehicle's worth), so you're going to want to prolong it's life however you can.

I mean, I get your point, but I need to refill my car at some point and there are plenty of gas stations - so why not fill it up early to take care of it?