Folding phones are pretty darn cool. Not just because of the novelty of seeing a modern smartphone display literally bend in half without breaking, but also because of their unique form factor, which can improve things like video calling, portability, and arguably the most important of all smartphone abilities...
You can obviously do the same thing using the Fold’s under-display selfie cam by flipping the phone open and using the camera app, but the quality leaves something to be desired, and using a regular, old selfie cam isn’t nearly as satisfying as making full use of your fancy folding device.