That got the jobs done faster. Penciler go fast, inker finish.
Artists were learning to draw comics by looking at finished art and duplicating it in pencil, doing the “finish” in pencil.
This was not a new discovery; artists like Steve Ditko and Dan Spiegle had been doing it for decades.
And the industry adapted.
First and most obviously, by allowing color art to break free of mechanical separations and blossom into a much more exciting part of the art.
Doing that final stage of drawing in ink was a lot easier.
Used to be, comics artists used zip-a-tone. Today you do that kind of thing in the computer. Tools change.
Times change. Tools change.
If you love inking, it’s probably best to learn storytelling. Loose layouts and tight inks are how a ton of comics are done.
Once Romita finished penciling a page, it wasn’t his to control any more.