That may be true, but mine were half the price of a similar sized speaker and has good enough quality for my kitchen, plus all of the other things I use it for.
For simple ambient noise it does just fine. If I want better I have a Klipsch home theater system.
But I don't generally listen to a ton of music regardless so its not the primary reason I purchased either of them. If thats the reason someone picked up a smart speaker, then sure, they aren't getting the best for their dollar.