LIDAR sucks, accuracy wise. If you want accuracy, and hate yourself, then you need an iPhone XR/XS because that was the generation with the most accurate FaceID (for whatever reason). Or go photogrammetry, the LIDAR can help but isn’t the main thing there… this is both free and great. With a Mac you can get the data processed faster, or it can be done (paid) via cloud, or with less accuracy and a bit of patience, on device. It’s not going to be a professional solution, but depending on the task it works and chances are the hardware is already there :)