If they don’t feel safe teaching, go get a job in the Solar Panel Industry as Horseface Kerry suggests.
This “not comfortable” crap started about thirty years ago. I had an employee tell me they weren’t comfortable doing something that was part of their job. I told them to “punch out.” Nothing would get me riled up more than those three words “I’m not comfortable.” My favorite response to this juvenile excuse was “I wasn’t comfortable getting out of bed at 0500 this morning, but I did.” I’m not comfortable writing this comment.