It's nerve wracking watching him smack the water (to recall Orkid) and seeing if she'll respond!
You'd also think two serious incidents would have made them rethink their interactions with Orca. And that's two we're aware of. There's surely many others not online. It took the 2010 incident/death to make a change.
The 2010 death was completely different. It involved Tilikum, a non waterwork whale, who pulled his trainer in when she was only in ankle deep water (known as a slideout).
In previous incidents such as the two that occurred in 2006, with Orkid and Kasatka, both whales were removed from waterwork following these events.
Orkid is a very smart Killer Whale, and it is widely believed she was just playing around with Brian, as he presented her with an opportunity to grab his foot, and she took it before eventually let him go. Even so, it was determined an incident like this couldn't occur again with her again, and she was removed from waterwork.
In the Kasatka incident, it is believed she was aggravated at the fact she was separated from her young two year old calf, Kalia for the performance. Kalia was apparently releasing distressed vocals throughout the whole performance, and Kastaka, who was known to have very strong bonds with her calves, eventually cracked and took her anger out on Ken in a very unfortunate way.
The 2006 incident involving Kasatka was also a result of Seaworld not having enough Killer Whales to perform. At the time, San Deigo had 7 Killer Whales; two were banned from waterwork (Ulises and Orkid), two were rather young (Nakai and Kalia) and three were waterworks performers (Corky, Kasatka and Sumar). On this day, Corky was rested from high duty performances after being heavily raked by Kasatka. This left Kasatka and Sumar to perform the majority of the show, and meant more time Kasatka was separated from her calf. With more and more whales being removed from waterwork, more whales were put under the immense pressure to constantly perform and this may be one of the other reasons why Kasatka cracked on that day in 2006.