Then the signal is trasfered to vinyl with all imperfections where does not exist a perfect cutting system, here there is several kind of signal loses: certainly what is in the recording was not what was recorded before all that proccess.
Raul, I would invite you to spend some time with a mastering lathe sometime. It may change your opinion!
The lathe can cut anything! It has dynamic range that must be very much in the range of the human ear itself- certainly far beyond that of any digital. It is this unlimited quality about them that makes them tricky to work with, as the cartridges and tone arms are the area where you have severe limited imposed- bandwidth, dynamic range, distortion and the like. The ability of the engineer to understand what can be reproduced is the mark of a good engineer.
But in general, the processing done by an LP mastering machine is minuscule compared to the damage done by an analog to digital converter, and all the digital process that follows.
There are those that say its a miracle that the LP system works, but its not a miracle, its simple engineering and an understanding of the nuances.