??What??
Do you actually believe that the millions of people who visit San Diego (your choice) do so to be educated.
Some of them might be educated whilst they are there - but that is NOT why they go, and pay the entry fee.
As I said, zoos do serve education in a non-obvious way. People may depict them as a fun fact, size comparison and fun animal experiences. San Diego is known for that, e.g. why it’s so popular