Who, outside of your immediate family, has had the biggest influence on your success in life? It is probably your teachers and coaches.
Peers, of course, also have a huge influence on young people, but not in an organized or necessarily positive way. Good teachers work hard to positively influence their students while equipping them with the knowledge and skills they will need to succeed in life.
Teaching and education are long-term investments; yet teacher incentives, when they exist at all, are usually short-term and often actually just the lack of a punishment — like loss of funding or cancelled programs. All stick, no carrot.