Do You Need My Help as the Domain Expert?

In a workshop, i will become the domain expert, right? The exercises that we go through really lend themselves to interfacing with the business. And when i walk around to different teams and I suggest or even ask, you know, do you need my help as the domain expert,. Do you need help? Anything in the business vision and so forth? And inevitably the developers will say, no, we got this. They are there to learn d d d. But one of the basic premises of d d d is that you're going to engage with the business - why isn't that message being sent more widely?