Photography does not work that way. Quality originates at the lens and sensor.
It may be a true statement that both cameras have sufficient quality for the user's needs, but it is not true that post-processing makes all cameras equal.
This is true. This is like the "enhance" functions you see people use on TV and the movies. There are interpolation algorithms that can enhance picture quality but they also are prone to interpolation error. The best media can look (or sound) is limited by its original source and any "bottle necks" in the processing history.