The shape of the obligation
Strip away the terminology and the requirements are ones most people would recognise as reasonable. Tell people what you are collecting and why. Use it for that and not for something else. Keep it accurate. Keep it secure. Keep it only while you need it. Let people see it, correct it and withdraw. Have a plan for when something goes wrong.
For a sales team, the uncomfortable part is not the principles. It is that most sales databases have grown by accretion, from forms, imports, business cards, referrals and lists of unclear origin, and nobody recorded what any of those people were told.