No one at Apple uses Siri, that would be my guess and it provides no value to the company. Heck I'm surprised when anyone uses voice assistance in general.
Voice assistance was the hyped thing sometime before block chain and LLMs. Everyone needed one or was working on one. So Siri got stuck into the iPhone, like Apple Intelligence is now, because "the market" needed Apple to do so to keep stock prices going up. Then the hype died out Apple sort of needed to keep Siri around, because it is one of the interface to the HomePod and CarPlay. There's no reason do develop Siri beyond that, because very few people use it, not having a better version isn't going to sell less iPhone and they can't mine the data, because they sold everyone on Apple being privacy friendly.
There's absolutely no business case in having Siri do anything beyond "Call my wife", "Next song", "Play U2".
People don't use it because when it was first introduced, it responded "I found some web results for that" for the complex types of things people wanted to ask it.
The technology exists for much better responses to those types of requests today, but who knows if they can re-train their customers that it'll work for them now.
There are definitely a lot of complicated personal-assistant type tasks that they could do now that people would like.
Voice assistance was the hyped thing sometime before block chain and LLMs. Everyone needed one or was working on one. So Siri got stuck into the iPhone, like Apple Intelligence is now, because "the market" needed Apple to do so to keep stock prices going up. Then the hype died out Apple sort of needed to keep Siri around, because it is one of the interface to the HomePod and CarPlay. There's no reason do develop Siri beyond that, because very few people use it, not having a better version isn't going to sell less iPhone and they can't mine the data, because they sold everyone on Apple being privacy friendly.
There's absolutely no business case in having Siri do anything beyond "Call my wife", "Next song", "Play U2".