Teaching really shouldn't have any issues then because everyone who votes Labour, Green, SNP or Lib Dem (more than the people who are 'right leaning?') should be flocking to do it!
I work with plenty of teachers with rather wishy washy political views (they aren't leaning anywhere)
What a bizarre thing to say!! And actually a recent survey showed a surprising number of teachers do vote Conservative.
I find posters on MN who say they have virtually interviewed a teacher about whether they enjoy their job or not on first meeting a bit odd. I would ass though that hairdressers etc who ask me what I do always then say ' do you like it?' and I am polite, so I say 'oh yes, I love it, The kids are great. ' And I am usually on holiday when getting my haircut! People always say teaching feels like a great job when you are on holiday!
Notwithstanding, I'd like to know what your job your DT guy did before. Of course, some people who change into teaching find it satisfying. On the gourds that something was generally wrong in their previous job.
I don't hate my job and wouldn't put anyone off who wanted to be a teacher. But there are systemic issues recruitment and retention at the moment and voting preferences are not part of the issue.