Is failing to educate yourself really being lazy? . . . . . .
Yes it's laziness
Chicken or the egg? Retailer or consumer. A retailer will not carry what he cannot sell. Therefore educating the purchaser is a must. We all see how well educating consumers work when it comes to hybridized, dyed, tattooed, maimed fish - it doesn't. If consumer education was the key there would be no non-indigenous species found in non-natural habitats.
By the same token, a purchaser can be a lingo expert and purchase whatever they desire in spite of not affording proper care. We see it all the time here in the forums.
Assigning responsibility to the retailer will not work either for the same reason. If they have a buyer, they have an inventory to make a buck. Enforcement on either end would be a nightmare as black-marketing would then prevail in greater form than currently exists.
There is no easy answer, and in the meantime it is incumbent upon us to teach proper husbandry while praying for the best outcome.