So for all the simple stuff, Siri works like a charm.
Homekit, Mac, iOS user here. If by "simple stuff" you mean "how's the weather," "Did the Braves win? (OK, I probably don't need to ask that question), "What day is Flag Day this year," then yes, 100% agree.
But I think "turn on the office lamp," is pretty simple too. My Mac can't do that, along with a lot of other things. Now HomePod can't do certain things like "what appointments to I have tomorrow," also simple.