Check the picture in this tweet:
This, clearly, is the nature of the beast.
Seems to me, “damage” implies permanence. As far as I can tell, the rings left by HomePod, etc., are like smudges. A bit of mayo (or whatever cleaning miracle you use for your wood surfaces) and elbow grease, and it’s all cleaned up.
Or put something solid under the speaker to prevent the ring in the first place.
[H/T Jack Brewster]