I use Siri for about four or five things:
- setting a timer; - sending a text; - starting a call; - adding an item to a shopping list; - playing/controlling music (very occasionally);
Siri does all of these with 95% accuracy. Occasionally it mishears "15 minutes" as "50 minutes" if I'm rushed or something.
You use the device however it works for you, but I truly cannot comprehend the use case of a voice assistant beyond these type of tasks.
More complex tasks would likely require more concentration on the response/result, at which point I shouldn't need to do it hands free.
Apple’s analytics probably support this which is exactly why siri still sucks. But ya, everyone will continue to think they somehow know better and apple is wrong and poorly executing