Anyone else know techs that “dont believe in wire strippers”?

So a couple of weeks ago i was doing a commercial install with one of my senior techs and we were wiring up all the air handlers in the attic and i noticed that he was only using linesmans to strip the wires. I didnt say anything because hes been doing this way longer than me and well, i needed my wire strippers to get the job done. Fast forward to last week were out doing a service call together and a compressor wire had burnt up so we had to splice it. He told me go run to the van to get a wire nut and i came back and he was reaching down in there struggling to strip the wires. I told him let me do it, I have my wire strippers on me and he said “no i dont believe in wire strippers” and he continued, accidentally cutting the wire instead of stripping for about five minutes until he finnally got both sides stripped. Ive only been doing hvac for a couple months now so is this normal? do any of yall know people that also dont like wire strippers?😭