Electric fuel pump wiring

I always wire them on their own, with a relay and switch. I've had floats stick while driving, or wanted to run the carb empty, or whatever and it's an easy way to do it when you can turn the switch off.
Once again factual answer . thank you . me personally that still doesn't fit into a logit why . but it does make some sence. To me its a safety reason. Just like the cut off switch on the back of the car. There will be 10 thousand reasons why you shouldn't have to have one of those ethier. The same 10 thousand reasons why you should wire your ignirion/ fuel pump together.