No - checking runout is done with a very sensitive little gauge. It measures the tiniest of variations in the rotor’s surface - b/c it only takes the tiniest of variations to create a problem.
Basically the idea is that if your steering wheel is shaking but your foot is not on the brake then its just unlikely that the brake rotors are the problem. The mechanic should be checking wheel balance, wheel bearings, tie rods - things of that nature. But a runout gauge can confirm whether or not the rotors need work.