I think that's unreasonable to ask for just about anyone. The only time that's going to work is if you're helping them with an issue that's critical to them. Otherwise you are never going to get their full attention, it even close.
Much easier and safer is to drill into your own head that your own engagement level may be at 10, but the other person's is probably going to be more like 2. And that's fine.
> I think that's unreasonable to ask for just about anyone.
Notice your parent doesn't say "you must be at 10," but rather "let me know if you can't be at 10." I think that's perfectly reasonable, as long as you're willing to accept almost always getting "no."
> Much easier and safer is to drill into your own head that your own engagement level may be at 10, but the other person's is probably going to be more like 2. And that's fine.
But sometimes that's not fine! For example, if you're giving a list of instructions for some safety-critical procedure, it's not fine to find out later that the nodding "uh-huh, uh-huh" actually meant "I'll do what I remember and what sounds easy," and it's much better to do nothing than to proceed with partial information.
Much easier and safer is to drill into your own head that your own engagement level may be at 10, but the other person's is probably going to be more like 2. And that's fine.