you are not wrong but I want to point out one thing. I have owned an echo 5 (?) for years and about twice a year the ads silently get automatically reenabled.
Its been feeding me ads for about 2 years I think, maybe a bit more.
I gave up turning them off and after reading this article I think I may finally unplug the echo. It primary use is "what is the weather forecast" and "set a timer for..."
in addition to the setting being buried at least once -> Amazon moved this setting between menu branches!
2nd point to note: the ads between Amazon music are feeding us border line inappropriate things for our kids - example: "watch this crime TV show" and then it goes on to describe murders.