However, programs have a life-span, and eventually the program that you loved may not work on new computers, or may stop being supported by its creators. So if the ONLY way that you can draw cleanly depends on SAI and one day SAI goes away... then you will be a very sad artist. So there is nothing wrong with using the tools you like, but you also don't want to be a slave to one tool.
I started out on S-7 and have been working my way down. I'm down to S-4 to S-2 on occasion, and my goal is to use it to slowly teach myself to have a steadier hand so eventually I won't need the stabilizer anymore.
Real artists only draw with their fingers on their own skin using their own blood.
No its not cheating because a pencil and a stylus are different. A pen is a stick with a graphite/clay mixture in it that you draw with on a cellulose surface by spreading grains that fall from the pencil with applied pressure. It's forgiving to microscopic shakes. A stylus is two pieces of moderately slick plastic that tracks the pressure and position of the stylus tip with electromagnetic signals which can be a bit too exact for its own good if you are used to a pencil.
Photoshop is awkward for lineart to some. I can't get over how a line can't taper below five pixels unless you draw with a brush that is below five in which case it won't taper at all.
The tablet picks up hand shakes to an unnatural degree. The stabilizer just restores the smoothness you can get with a real pen. If that's cheating, then using any tool besides drinking kool-aid and licking the paper is cheating.
I don't think it's cheating. My lines are much neater when I sketch traditionally. The stabilizer just compensates for the shaky hand when using a tablet that you wouldn't otherwise have. I don't use it myself... but my lines are very shaky and could definitely benefit from it.