There's no accountability. Who are the people answering questions? Are they experts? Can they outperform me?
Only person I saw has stats in their profile to give any sort of indication about their skill level, Berin. Dave Liepmann is the top user in Powerlifting tag yet has no indication he's ever competed or trained as a powerlifter. Why on earth would I take advice on powerlifting from someone that may or may not even do powerlifting?
On other exchanges the lack of accountability is made up for because answers are supposed to be... well specific in terms of answers. Here its not as cut and dry the majority of the time. On Graphic Design for example if someone asks how to perform a task in X program I can answer them. If it works they know I was correct. Here that time to find out if it works takes years if ever, and that assumes the person was correct and the person asking performed consistently.
Until either a requirement is put in place to state your credential and/or source your answer from research there's just no reason IMO to post here. All it does is frustrate me when I come to look at it and feels like the blind leading the blind. I'd go to Bodybuilding.com if I wanted that, at least there some of the profiles have pictures that may or may not be the person haha.
But seriously, consider some way to hold your users accountable. I don't post answers because I don't even consider myself elite in my various physical fitness activities.