I would argue this. I have been involved in hours upon hours of studio sessions. It is quite rare that anyone has a single take or the take you hear is from only one take.
Most vocal tracks and many guitar tracks are made up from several different tracks. Vocals almost never hit the first verse with a run you’ll want to keep. The second chorus is often a keeper. Sometimes depending on the way the verse and chorus mix, the second chorus is copied to the first chorus.
I’ve worked with musicians that, on stage, they belt it out with no (or next to no) sour notes. In the studio, with the headphones on and a sterile enviroment, many musicians don’t “feel it”. I’ve also worked with the flip side. Musicians that are more at home in the studio but if you put them on stage and they gak like crazy.
Some tracks will sound fine to everyone else, but the artist or producer think they can do better. They spend the next hour tracking the vocals and piece the best bits together. They are skilled enough to capture the track the same as the pieced together bit, but why bother when you’ve already got it.
Time in the studio isn’t like a paint by numbers picture. It’s more like working with oil on canvas. You continue to shove and blend the colours until the image in your mind is in front of you.
Your comment is almost like saying if an artist has to erase a line, repaint over an area, or start the painting again… then they just aren’t that good of an artist.