At a bare minimum the HomePod requires a reflective surface behind it in order to successfully 'beam form' and generate its full soundscape. In the pictures of the CR test they had it standing on a table several feet from an acoustically treated wall, with a shelf loads of amps and other paraphenalia in between. Also surely the "worst situations" are in fact the "best situations" for a speaker that has been designed to work in said "worst situations".
To use an analogy, something designed to be used 1000' under water is probably not the easiest thing to use on dry ground, compared to a similar product not designed to be used under water...