Not to be contrary but this forum has tens of thousands of members, many who have decades of experience and are LFS owners, operators, breeders, and biologists, so to assume that the knowledge base here is trivialized against your LFS is rather shortsighted.
It doesn't take a degree in biology to become a LFS owner, so I wouldn't assume they have scientific data. And most importantly it takes good business sense rather than a background in science to be successful.
They have tons of experience though and that's great, since that's 90% of the battle, but it doesn't mean that a LFS is always the be-all end-all. You can do simple google searches or read this thread to see several other mythologies perpetrated by LFS and old school fishkeepers. (examples: 'cycle fish', big water changes are bad, and perpetual salt use in FW systems).
Much of it has changed in the last few decades thanks to new scientific findings and the ease of information exchange via the internet. A LFS is not going to tell everyone to buy pure salt at pennies on the dollar compared to 'aquarium salt', or to buy a giant bag of quilt batting or pot scrubbies for replacement filter media, nor will they tell people how you can buy sodium thiosulfate crystals at a few bucks a pound. For those interested it's the active ingredient in water dechlorinators and $5 worth is enough to last most fishkeepers a lifetime. And don't get me started on medications.
You don't have to agree with anyone here, none of us do, but in an effort to be accurate at least spend some time researching the science behind your claims if you are being debated on them. I think we can all find some common ground in hard facts rather than just arguing personal experiences.