Star ratings, as a pattern are generally in decline for things like this. People using them in software like Apple Music/Legacy iTunes are the minority of power users. You can go to another service out of protest, but Spotify doesn't offer star ratings either. so ¯\_(ツ)_/¯
I'm full-on in to Homekit and, in my experience, Siri is excellent for things like lights, temperature, fans, cooking timer, music, podcasts, and radio.
Apple's whole approach to Siri is intended to be less syntactically prescriptive (for the user) than Alexa, while also not allowing third party vendors/integration partners to just reserve words or phrases for their services and stomp all over everyone else.
It is a theoretically "smarter" approach than Amazon's but a functionally less useful one since Apple really isn't applying it broadly and doesn't have the same richness of data/service integrations of Alexa. All of that said, part of them "fixing" Siri to be better at these things means cleaning out legacy cruft and paying down tech debt, which clearly they are doing, as evidenced by them removing old, low usage, deprecated features like this one.