This forum seems to have gotten a little heated, lol.
I think it's safe to say that this topic doesn't pertain to the webcomic community only, but for the sake of simplicity I won't go on a tangent community, haha. I think it's also important to note that comics aren't just about artwork; in fact, the foundations of comic making can be broken up into equal parts art, storytelling and design (which is a separate entity from art).
Based on your initial post, I notice the word "STYLE" come up a lot, and most of the arguments stem from there. You said that style should be the last thing that a budding artist should focus on; @punkarsenic said style making and foundations can be learned at the same time. I say you're both right (and I don't think you were condescending, but maybe you didn't initially explain yourself well enough).
There was a person on here recently that asked for art advice, and what I wrote, in the beginning, pertains a lot to what is being discussed here: https://forums.tapas.io/t/needing-advice-on-my-art/25622/8?u=saajing. It's pretty long, so I'll just be paraphrasing here.
To make it clear so everyone is on the same page (newbie or veteran), the term style refers to the abstraction of the observed world, based on conscious subjective memory enhanced by the imagination. Big words, lol. All n all, style is a form of abstraction.
If you are asking why young artists don't focus on the foundations and only on style, It's because they don't understand what stylizing truly means, and they are unconsciously abstraction from established abstractions (i.e. anime and manga) because they are aesthetically pleasing and they want to mimic that. Also, (and I think this is what @punkarsenic was trying to explain) even if they do become serious in pursuing the art, and start to learn the fundamentals, i.e., learning to see, they will still be unconsciously abstracting those fundaments because they are just beginning to become comfortable with the forms they see outside of those established abstractions (or observational drawing) and are now putting their visions on paper.
I don't think you were saying new artists should draw like Rembrandt or DiVinci before they start their comic-making adventures. I think what you were really trying to ask is why they don't value draftsmanship skills more. It's a reasonable question, and in truth, it's mainly because they are young, and they are still learning; those who are serious will seek more knowledge, and those who are not will stay right where they are.
The fundamentals do seem to be a hot-button issue with a lot of young artists (i.e. inexperienced artists) who, as @punkarsenic mention, ignore them. As someone who has gone through the illustrious " this is just how I draw" stage, in the words of Kevin Hart:
"They gon' learn today."