My family always took the “do both” approach but like you said. Bring it all pristine and presentable. Then once it’s set out, someone without even asking just starts cutting a bunch of slices and putting a few on plates. Then after that, you’re free to cut if there aren’t any precut ones.

Never a problem with untouched desserts there. I also learned they won’t go for desserts unless it’s in tiny portions. Because “I’m on a diet but I want to try a little bit.” Ever since learning that lesson the hard way, I bake things bite sized.