proto732

While I am I the Shortcut Beta program, and extensively experiment with its capabilities (and Workflow before it), I don't think the vast majority of Apple iPhone users have ever bothered with it or know it exists.  It's a great supplement to Siri, and fantastic for automation gurus, but it doesn't excuse Siri being so far behind in general voice capabilities from Alexa.  And I don't mean Skills that integrate with ever other electronic device in your house via a special phrase, just simple basic stuff:

Me:  "What time will it be in 9 hours"
Siri:  "The time is 10am"
Alexa:  "In 9 hours will be April 14th at 7pm"

There are just so many basic questions I've asked Siri that she simply cannot understand, that 90% of the time I just use Alexa instead.
There is also a consistency issue across Siri appliances.  Siri on my phone/watch != Siri on my MacBook Pro != Siri on HomePod.  
Absolutely no reason why Siri on a MacBook Pro connected to the internet couldn't do everything Siri from the Phone/Watch can.  

From the Consent portion that Ziggie posted it looks like they are making use of the Hiya backend.

I've been using the Hiya app since it came out on iOS and it does work fairly well.