Mm--this is actually a huge misconception.
So when you use something like a "smoothing tool" it's not drawing for you, what it's actually doing is the same thing we do traditionally when we use a brush with a longer head. For thousands of years, artists have been doing lots of things to their brushes and their paints to mitigate hand shake and imperfections. The thing about digital art, is that it's hard to get a hold of a pen with a long brush tip, which is why smoothing was implemented to mathematically create that long brush tip (that's all smoothing is, ps, it does not draw for you). Since every artist will have a different amount of hand shake, to say that an artist needs to have perfectly steady hands to draw, is extremely ableist and niave to what's really going on behind the scenes, both traditionally and digitally.
As far as Adobe Illustrator goes, people don't do comics in Illustrator. Illustrator is a drafting tool for precision vector lines meant for manufacturing and printing. Those lines are perfect because they have to. It's for die cutting. The process of making these lines is pretty slow, and so people just don't use it for quick illustration.
So people who use vectors in drawing, tend to use programs like Clip Studio Paint--and drawing with vectors is cool, but it does not create perfect curves and lines. That is just skill you're seeing. I hate to break it to you, there is no art program that will draw for you. Maybe it will create a nice speech bubble--but so can a speech bubble stencil, which is something I can buy at any art store. The tools we think are just in digital media like stencils, rulers, and perspective guides--we've already had them in traditional media for hundreds of years.
