That sounds like a tricky message to deliver:

1. It could easily come across as "my time is more important than yours". 2. Depending on what they are asking for and how urgently they are treating it, they might not want a lesson in solving their own problems. They just want help fixing the problem. 3. A lot of people are self-centred. Of course their problem should be your top priority and you should drop what you're doing! /s

...So yeah, I'd be surprised if it didn't get a bad reaction sometimes. Perhaps seek to promote this approach when their problem is resolved. I would imagine they would be more receptive then.