The process of recording a song is a journey musicians are excited to go on. Its an exhilarating prospect to create a piece of art that can be enjoyed by everyone around the world and at the same time make it persist through the course of time.
It begins with preparing the arrangement and the instruments for the recording itself. Having the songs tabbed out in guitar pro or even preproduced in a DAW, helps immensely throughout the process with organizing the different elements and tracks that need to be recorded. Furthermore it can be used to train the material before the recording even begins, so that there is a great performance to be captured and it is not upon the engineer to fix everything with extensive editing.
Although there is a case to be made for modern metal genres where it is close to physically impossible to reach the amount of precision and speed required to get to a point where no editing would be needed. But even in those genres a great performance, that just had to be "touched up", will outshine a recording greatly, that has no resemblance left of what the musician actually played.
While recording the objective is always to get the best possible source material for the later stages of mixing and mastering. Here many of the decisions are made, that will determine the sonic signature of the release. What guitar, pick, drumhead, cymbal, microphone etc. is used has an effect on the sound and therefore has to be carefully selected. This is also where the amount of experience the engineer has with all three stages plays a big role. When you have mixed and mastered hundreds of songs with subpar quality source material, you have a much better understanding of what matters in the recording process, what to avoid and what to aim for.