So long as the animals can get away from the visitor path, and have the choice to approach or not - what is the problem?
This is all spot on, and thank you for concisely summarising it.
To go on further, the Spanish population was never self-supporting without being fed by the public, so the species was illegally listed in the first place as it did not meet the criteria of an invasive species, which by default has to be self-supporting and sustainable. There has already been a legal challenge to this illegal listing, but this will be a while before it comes into force. When the species is de-listed, zoos will be free to import new stock, or obtain animals which continue to be bred and traded 'underground' by private breeders.