There's about two dozen+ makers of 1911s. Some have models with polished this and that and others don't, some makers have polished this and that on some models and not others.
Some makes/models are harder to disassemble/reassemble than others.
If a 1911 sees a long service life with high round counts it's going to need more long term maintenance than some other types of firearm. A vast majority of the parts need to be fit correctly to each gun. Given the large number of makers and even larger number of after market parts makers, it's important to have the gun put together right.
That being said, it doesn't take a rocket scientist to learn the user end maintenance of a 1911 or how to properly employ such a pistol. Do your research (The top link in my signature is a good place to start), also, an polished feed ramp is not the end all be all of improved feeding.