So you contradict yourself because as you stated mma won't teach these things. It all depends what the person wants out of their training, if they want self defense then they need to become adequate at striking, grappling, (clinches and groundwork) and weapon disarms.
Where they acquire these...
It sounds like you want to go into kickboxing to be honest. Being a boxer for as long as you have you already have a deep understanding of range and footwork, which is honestly one of the most important things when it comes any sort of striking or hybrid art.
Turning your back is common in point fighting because it's illegal to hit the back, just because it's legal doesn't mean it's not cheesy. This is why people say sport karate and sport bjj aren't actual karate or bjj.