I agree with pretty much all of the above.
Talent wins games. Team chemistry (playing for each other/trusting each other/brotherhood) wins championships.
When my son was a freshman, there was a strong leadership core that showed the new guys what was acceptable/not acceptable on and off the field. Those guys handled the locker room so no small potatoes ever got back to the coach.
Now that he’s a senior, the leadership council is responsible for doing the same. The best teams self police!
The high school head coach has also done a great job of creating a culture of family. They spend a ton of time off the field together and are a close knit group. Hopefully, that will pay of in May.