Almost every trade competes on response speed. Plumbing is the one where the response itself can reduce the damage before anybody arrives. Turn off the main. Turn off the water heater. Do not run the dishwasher. That advice costs nothing, it is the same every time, and it is the reason a plumber's automatic first reply is a genuinely different thing from a roofer's.
The second difference is how varied the work is behind one phone number. A burst pipe at 2am, a water heater on its last legs, a slow drain that will be back in nine months, and a bathroom remodel are four completely different jobs with four different urgencies and four different values. They all arrive on the same line, and sorting them is most of the battle.
And then there is Minnesota. A cold snap turns frozen pipes into a one-week surge that behaves exactly like a roofer's hailstorm, except the callers are more frightened and the damage compounds while they wait.
The point is not that a machine fixes plumbing. It is that the boring, repeatable part, triage plus first-aid advice plus capturing the address, happens in ten seconds every time instead of whenever someone can get to the phone.