Why do jaw and chin implants get such a bad rep?

#1- Unfortunately, generic or standard implants can present many issues, and the "bad rep" is somewhat fair.
#2- Rhinoplasty should not affect the appearance of your nasolabial folds, or at least not in a meaningful way.
#3 Midface implants can be designed in such a way that they can improve or affect different areas of the face, whether you want to affect the nasolabial folds by lifting the submalar / paranasal area or the hollow under your eyes.
Custom implants minimize the issues typically associated with generic implants.
Best wishes