"You can easily find a job" - I would like to know where you are getting this information.Tenure seems to not be as important because almost all districts have teacher shortages
You can easily find a new job
Counter-example #1: My wife is in the business, for a recent opening at her school they had 200 applicants. They picked someone with connections to current staff (i.e. nepotism).
Counter-example #2: My daughter recently graduated with a teaching degree from TCNJ as the #1 student in her cohort. TCNJ is one of the top colleges in the area for a teaching diploma. She had a very hard time finding a job after responding to every local posting in the South Jersey area. Finally found a job only because she had value in a niche concentration.
When I get a chance to read the rest of these pages I'll provide my input to this discussion. For now I will say that there are too many teaching degrees awarded. Teacher's union management continually puts out news about current or impending teacher shortages. It's nonsense but it's in their interest keep perceived demand high and salaries relatively low in order to keep their jobs. The system is definitely broken with plenty of blame to go around to all parties.