Ignore him, sounds like an idiot.
I took a digital tyre guage with me to my last MOT as I knew the rear tyres were very low but legal and was suspecting issues. I checked them before going in for the test (different system here in northern Ireland with government run and staffed mot centers) and they were 1.62mm on the drivers side and 1.64mm on the passenger side. Not one word was said to me. They were replaced 3 days later after I was paid, Bridgestone Potenzas for a Focus ST ain't cheap.