From a patient's viewpoint, they of course would like their dentistry to be done yesterday. And as a patient, I too would love that to be the case but...
As the title says, perfection does take time. Patients need to understand that dentistry can be very complex. We are dealing with not only the patient but materials, technology, labs etc. Unfortunately, putting all of this together to create the perfect restoration does not come easy and can take numerous visits, hours at the chair and waiting time for the lab to complete the restoration.
There have been attempts to have all of this done inhouse where the dentist uses a variety of technologies, in the office, to produce the restoration. In some hand, this is fine and can produce a great restoration. For the most part, however, dentists typically rely upon lab technicians to create the final restorations. If you want the best, it will always take time. The last thing you want to do is to rush the ceramist etc. They too have limitations on time, materials and technology.
So the long and the short of this is.....if you want the best you need to give your dentist the time necessary to provide you with the best they can. Shortcuts almost never work and in the end, it is the patient that will suffer. So sit back and give treatment a chance....remember Rome was not built in a day and the same thing goes for you new dental prosthesis.