I have started using the Pigma Micron Pens by Sakura for illustration work for a little while. But, Ive noticed, particularly comic book artists, say that for professional work they either use a brush and technical pen or nibs. Most of the time the technical pens that they are referring to are usually by Kohinoor, and are "old school" traditional steel nib pens that you have to fill with india ink and maintain and clean constantly. Some artists say they use those pigma pens for less professional work like convention sketches.
I took a college drafting course where I was instructed to buy those Rapidograph technical pens, and I really considered them a waste in that sometimes they never work....or spill. The maintenance required is also way too much of a hassle, really. It seems so ridiculous. I just bought the Microns, and they were MUCH more convenient, and it is listed on the pens that they have the same archival fadeproof and waterproof ink. But still, some of the instructors said to stick with the Rapidographs and avoid the Microns if you could, if you were doing traditional drafting. I never understood this. Maybe my instructor mistook the Micron pens for some other kind of pen?
So, then why is it that some artists (comic book artists really) see those pigma pens such as the Sakura Microns and similar not fit for "professional use." Should I be using them professionally alongside a good sable brush? What do people see in those technical pens, anyways? I know they are great for creating technical linework, but cant the Microns accomplish the same task? Is there something that I am missing? If the Microns are not suited for "professional" level work, is there another kind of pen that is like the Rapidograph pens that is not so much of a hassle and actually works?
Can somebody kindly answer the questions I have and bring some kind of clarity to this matter?