@Graham_Mitchell The BBC are the worst offenders, they can't make a documentary without putting an irritating piano soundtrack over the whole thing. We stopped watching Blue Planet II half-way through the series because of it!
It can also make stuff difficult to follow for the hard-of-hearing. Yes, there are subtitles, but in the age of mega bandwidth for TV, would it be beyond the limits of ingenuity to have a "no music" option, similar to the options they have for football commentary?