Wisdom teeth aren't the problem, they're supposed to be there. Wisdom teeth getting compacted are a symptom of a larger problem.

If a child is not fed enough tough foods, then they end up not using and developing their facial muscles correctly.

If those muscles which should be guiding the jaw into it's correct position aren't being used correctly, they end up causing the jaw to not develop properly. Now you end up with a mouth-breathing child who has a reverse swallow, crowded teeth, and is going to need braces, a retainer, and possibly a CPAP machine.

Can you back this data up with any source?

Afaik here in Spain is rather common to have your wisdom teeth pullet out (I have), and it's the first time I hear this theory.

It's based on this hypothesis that bone growth, including in the jaw, is determined by the exercise of soft tissues.

https://en.wikipedia.org/wiki/Functional_matrix_hypothesis

Maybe you just came up with a good idea for a PhD in dentistry.

I'm already full-up on hobbies, jobs, and callings, thankyouverymuch!