How much should users have to learn before using a B2B product?

I work on a B2B AI product, and one problem I keep running into is deciding how much of the product’s underlying concept users actually need to understand.

Some things can be simplified through UI, but simplifying too much can also hide information users need to make the right decision.

I’ve started thinking that the goal might not always be “make everything intuitive.” Sometimes the product may need to teach the user something first.

For people building complex B2B products, how do you decide what should be simplified in the UI and what users actually need to learn?