I dunno - Bunny the talking dog has a YouTube channel that's fascinating. The dog talks about dreams, feelings, friends, family, and fart jokes. Koko the gorilla was a more interesting and empathic person than many actual humans I can think of.

Whales making fart jokes would make the entire enterprise worth it.

I think not having language is a limitation on the upper bounds of animal intelligence, and providing voices through technology will enhance animal cognition beyond what they could achieve naturally.

Humans providing education and training could make their lives more meaningful and nuanced by giving them the jump start of participating in our culture. Besides, imagine cooperative orca tribes assisting in human endeavors, like seasteading and ocean rescue?

Who knows, if orcas are smart enough, they could be the first nonhuman writers or scientists?