This tends to be a problem at the main LFS here in Ocala, ask a question beyond "what type of coral is that?" or "how much?" and you will be met with a lot of blubbering as they don't know simple requirements of what it needs to thrive.
There is an LFS up in Gainesville that has a TDS of the "RODI" water higher than the water IN to my RODI. Hasn't changed filters in year. But he has been in town for 20+ years and is in a college town with a rotating population, so he gets new clientele every year. I hear he is looking to sell and get out of the business.....
This has been the rise/fall of numerous stores across Central Florida. Right now, within 20 miles of me, there are 3 "traditional" stores and almost 20 "hobbyist" home stores who have all teased opening a store...luckily the "smart" ones are content running out of their house/garage.
Stores have a habit of preferring brands they trust while stocking brands that help them make money. We had an LFS here that preferred Red Sea products (average 30% markup) but would also carry Brightwell, Instant Ocean, and Seachem (50% markup) because of the extra profits off the items.
Unfortunately this hobby is competitive on the LFS front from multiple sides, competing with other LFS, hobbyists in the area as well as online vendors. Sometimes a store doesn't make it, and while that can suck, that is what happens...you can have an amazing LFS full of good livestock, knowledge, and customer support go out of business while a less reputable LFS has better business since thrive.