"Completing" Comics for Practice

So, I'm learning how to make comics, and have opted for the "finish a comic all the way through and move on to the next thing" process that I keep hearing about. It seems like I constantly see people giving practical advice about writing, illustrating, studying comics, etc. But then they'll say something like "but above all, just make comics." As I get further into this process, I've ran into some issues with that.

I've gotten to the point where I struggle with the process conceptually. Like, I'm not sure what I'm "practicing" by doing this. I've been making comic strips and 1 pagers for practice, and I'll reach a point where I have it written, storyboarded, thumbnailed, etc. And all that's left is the art - I'm not an artist, so this is the part that takes the most time and effort. And at that point it doesn’t really feel like I’m practicing anything towards “comic making,” other than the art. WHICH obviously isn’t a bad thing, but at that point I almost feel like I should be putting the effort towards just practicing art.

Is the main reason for “finishing comics all the way” so that you can have finished products, thus having something to show for your efforts and providing a feedback loop of motivation? Am I actually gaining anything practical from this practice as far as “making comics” goes, or should I be putting this effort towards learning how to draw instead?

I constantly have conceptual issues that are increasingly impossible for me to explain enough to seek guidance for, so forgive the scrambled post.

EDIT: I imagine part of the point of practicing like this is honing things like story-telling, pacing, stuff like that. But it hardly seems like making comic strips that are basically glorified jokes would help that much. And even if they were, it goes back to what I said before: wouldn't I have already gotten that practice before the art stage, and without finishing it completely?

EDIT 2: I have several other stupid, hard to word questions like this about the process of comic-making that I really struggle with, so if there's any good samaritan out there who wants to provide guidance for somebody who REALLY wants to make comics...hit me up. lol I know that doesn't sound super appealing but I've had success with stuff like that before so I figured I'd put it out there