Can you point to an area where a teacher with 10 years of experience, working full-time, earns less than an entry-level position? Teacher contracts are mostly public and you can use $15/hr for entry level, shouldn’t be hard to find and example if it exists.
Many entry-level sales jobs, which often require no specific college degree, though typically a college degree is preferred, earn 50-70k /year. Entry level sales, specifically, can easily net over 100k a year if you are good at what you do as you work at least partially on commission.
Teachers, companies are discovering, are desirable sales reps because they are experienced at being high energy, talking extemporaneously, and may have some domain specific knowledge that is valuable, such as a chemistry teacher going into pharmaceutical sales.
Most teachers will never make 100k in their entire career. Some districts pay well in high COL areas, but this is the exception not the rule. Entry level pay for teachers is actually pretty good, but your salary does not scale as it does in most other careers. It typically takes 20+ years to get to six figures if you can at all.