Qualified I dont think so. Nct were employing unqualified people a few years ago and had to sack them when it came out. As for a motorcycle mechanic we dont seem to have a Fas or other reconised course in Irl.
Tyers go off very fast these days a marginal tyer rapidly goes off and I have been cought out by a tyer that shows a bit of thred suddenly shiwing canvas.
I fit my own tyers and if I wanted to fool a tester it would be very easy to swap a good tyer in for the test. I do agree with you about people deiving/riding around with defective tyers/lights/ect but a nct wont change that. look at all the one eyed bandits on the roads and if you say anything the usual answer is 'I know'. JJH