An advanced weight lifter with no college education but a real world self-taught education would triumph described degree holders in this particular area. Degrees only go so far.
Citation needed.
The whole point behind a degree in sports science (and any science degree) is to acquire the skills needed to understand data and test techniques via the scientific method to discover what actually works. Any experience weened from trial and error is anecdotal. Knowledge obtained via published studies has been peer reviewed and shown to be statistically significant with results that can be replicated.
The real world weight lifter in your scenario may be onto something, but without some kind of rigor to the claims, that's impossible to say for certain. The academic degrees seek to fill that gap between "This seems to work" and "I know this works... And it works this percent and here's how I think we can refine it."