One could argue that the whole point of ads is to draw your attention and put things into your memory, which is not necessarily the case for those other things. Some radio programs probably are meant to draw attention, but you could notice this and switch away, which brings us to...
> Where does the line get drawn?
Ideally by the person who knows most intimately how badly you're being distracted, i.e. you. (Until they get the ability to scan your brain.)
Self reporting of distraction doesn’t seem to work so good, as evidenced by the number of people texting, scrolling social, or whatever else on their phone, while driving.
Before phone, we still saw men shaving and women putting on their makeup.
I have 0 faith in people to self regulate and avoid distractions while driving. At least at a population level.
> Where does the line get drawn?
Ideally by the person who knows most intimately how badly you're being distracted, i.e. you. (Until they get the ability to scan your brain.)