I understand where you're coming from but the expense of our fish isn't to teach better behavior but may be a good result or side effect of it. When we captive-breed yellow tang it's at minimum 3 months of skilled labor, feeds, rent, electricity, etc. in each batch of fish while to collect the same number we produce in a quarter could be caught in a few boat trips from the wild.
We encourage hobbyists that purchase from us to take care of the animals we breed because we have taken such expert care of them for months prior to shipping them out to customers. So it's not just cost but the effort associated with it.
It's the same reason why a 17 year old buys a beater car rather than a BMW. Maybe it's better to make mistakes on cheaper, abundant species that are constantly replacing themselves in the wild over an important herbivore. There are many "
jellybean species" on the reefs that are constantly replacing themselves with already short lifespans why cut an estimated 15-25 year lifespan short because of a lesson. No one is learning a lesson on a peppermint angelfish nor should they. I encourage beginners to start reefing with gobies, blennies, or damselfish. The Pratt Institute teaches students about the aquarium hobby by first taking care of aiptasia in a jar before anything else.
I'm also not one to anthropomorphize the fish or get into the ethics or sustainability of wild collection but when a fish's sole purpose being bred in aquariums for aquariums, accepts prepared diets, lives through aquarium life and the fluctuations that entails why is there a need to take it from the wild? It's the reason we breed mandarins, with the incredibly low survival rate from the wild you're lucky if one lives past 3 months and they're even
microspeared from the wild.