Ok, first off, the whale deaths that sparked this recent controversy happened in 2016. Orcas and Belugas are both types of whale.
Second, I lived in Vancouver for a number of years and visited the Vancouver Aquarium a bunch of times. While the upside down Orca was disturbing, I also have seen the Beluga and dolphin shows there. So my opinion is not "hopelessly out of date".
Secondly, you are repeating this line that as a non-profit they are somehow more noble and different than Seaworld, for example. If that's the case, why do they loan animals to SeaWorld and other Aquariums for breeding?
"On breeding loan to SeaWorld, Shedd Aquarium & Georgia Aquarium are the following:
Allua, a female beluga is around 24 years of age. She was moved to SeaWorld San Diego on a breeding loan in 2005.
Imaq, a male beluga who is around 21 years of age. He is on breeding loan to SeaWorld San Antonio.
Grayson, a male beluga who is 8 years old living at the Shedd Aquarium. He was born at SeaWorld San Antonio in 2007, but belongs to the Vancouver Aquarium as he was born to Nanuq, who was owned by the aquarium and also fathered Qila. Until early 2016, Grayson was living at the Georgia Aquarium with his half-sister Qinu.
Qinu, a female beluga born in 2010 who is 7 years of age living at the Georgia Aquarium. She was also born at SeaWorld San Antonio and lived with Grayson until he was moved to the Shedd Aquarium. As with Grayson, she was born to Nanuq and belongs to the Vancouver Aquarium."
The Vancouver Aquarium is a non-profit organization, and has much different goals and priorities than Seaworld.