Some people's expectations on the HomePod (including yours) surprises me. After watching the keynote introduction of the HomePod, I knew moving forward that Siri on it will not be the big seller but it's its sound quality.
Seeing it in person and finally hearing it made me more excited about it because to me there are no other speakers out there in such a small package that sound this good!....and I've been listening to 'Hi-Fi' since I was young in the 70's and been lucky to have had all sorts of sound systems growing up.
The HomePod to me is the perfect combination of size and sound. It doesn't compare to bigger speakers or other sound systems with artificial intelligence. It's not really a competitor to 'Alexa' or 'Google' but Siri provides basic useful information and HomeKit functionality.
Look at it this way: It's simply a great sounding small speaker that has the added functionality of Siri. It's speaker first and Siri second at this moment in time....and I'm OK with this.
I've spent $500+ on more powerful stereo systems that I would use 50% of it's power most of the time when listening to music (not counting my home theatre set-up which is meant to be loud, of course). The HomePod, at a lesser price, suffices my music listening cravings!
Oh, and have you tried listening to it on low volume at night?...the bass response on this thing is awesome at such a relaxing volume! Other competing small speakers don't even come close.
Just my 2 Cents.