There are a lot of jobs in teaching and most are not tenured. And that's probably true of many disciplines, not just art. Many are not even full time. So... depending what you are looking for, it may not be a comfortable situation - but it might be good enough as a day job. At least if teaching art is within your tolerance for a "not toxic" job... From an economics perspective, the fact that plenty of people teach art without tenure may have something to do with why so little tenure is available.