But that $10 BT speaker doesn't employ multi-speaker automatic adaptive beam-forming to equalize room acoustics, providing superior sound. Nor does it have an adaptive beam-formed away of microphones so that it can precisely locate a user's voice, at a normal level across a room, for siri music commands in a noisy environment.
That $10 BT speaker also doesn't work autonomously, without the need to work with a phone/tablet/computer for playing Apple Music.
In other words, it does more than what a BT speaker does, and was not designed to compete with BT speakers. Two very different devices.
You are totally missing the point. There are two parts to sound...the source and the output. The output by the Homepod is obviously miles better than a $10 BT speaker and justifies the price.
However, if a $10 BT speaker can cram in a few different source locations (bluetooth and usually 3.5 line in), you would think a $300, $100M R&D budget speaker can take something other than proprietary AirPlay.
There is literally no way to connect them to a Windows PC. Do you know how many people use a Windows PC for work (1. Mac Keyboards didn't work for 4 years; 2. So many business apps run terribly on MacOS).
The whole point is BT is actually already in a homepod but Apple hasn't configured the software to let it be used. This is a massively popular open standard, something other Apple products use (!!), but the Homepod doesn't allow it.