I would remind to to be wary of the reptlie shops.
Some thing s are simply suggested because they were suggested years ago.
I happen to know of a reptile shop that recommends feeding cornsnakes crickets. So buyer be ware! and ask a lot of questions

I think also, the pet folk man well...just do not have the time to fully research the latest suggestions...
Remember when moms were told to give their babies brandy if they were teething? That was only 30 years ago...same kind of thing for herps.