So some like cat trax, some don't. Some like to walk in their boots, some don't mind leaving a second set of shoes in the lodge. Cool. On to the actual question, Dude your boots are old as sin. What he was talking about was the sole interface with the binding. Your sole is most likely warn way down. The ISO/DIN standards say the height of the toe/heel lugs should be 19mm & 30mm respectively. IIRC there's a -1mm tolerance for wear. If your heels are quite worn or if the wear across heel is greater on one side, when torque testing I've seen greater affects on the functioning of the binding with relatively less wear on just one side (ie the base of the boot is chamferred) compared to greater wear that's even across the sole.
"I thought the guy was full of crap. the boots are my every day and are also classic. and they are not too worn out."
The guy was most definitely not full of crap. Your boots are old and not classic. I could care less if you don't want new boots, but don't claim that he is trying to pull one over on you. He may have used the wrong technical terminology, but that does not mean he is wrong completely. With the age of your boots you will continue to get comments about the interface, So get use to it.