Respect and attention get conflated a lot. They’re not actually the same thing.
When someone isn’t paying attention, it’s often assumed that they are either intentionally avoiding listening, or refusing to put any intentional effort into listening. And that, if they just respected the speaker more, they’d be paying attention.
Sometimes that’s true. And sometimes, the reason someone isn’t paying attention has nothing to do with respect. Often, it’s a neurological, psychological, or psychiatric issue. Or the result of pain or fatigue.
For instance, respecting a speaker and wanting to listen to them doesn’t cure ADHD. Cognitive attention problems caused by ADHD have to actually be accommodated and worked around. (For instance, taking medication, learning organization techniques, using captions to focus attention, collaborative note-taking, etc.)
Addressing values only helps when the problem is values. When the problem is disability; you have to address and accommodate disability in order to make progress. No amount of education in respectful attitudes will help if respect isn’t the issue.
tl;dr Please stop assuming that failure to pay attention is always a sign of contempt. Sometimes it’s just a sign of an attention problem.