That’s a good point. The figmas we build are not high fidelity. But they’re more than wireframes. The point is to get everyone on the same page conceptually as to what is going to be built, but the details are still left as an iterative process for the engineer implementing.
The point of the figma is to answer the question “what visuals will help ops, legal, and engineers be on the same page when discussing” and NOT “the button should be 48px down”. UX specific “extras” like confirmation modals, etc. are never added because that doesn’t answer the first question.