I've been doing art for decades. Serious art only started about 10 years ago, when I decided to start putting in long hours of practice. I still can't draw comics to my satisfaction, but my regular drawings and paintings are saleable and I have made my living off just my art in the past.
I use other methods for my comics besides drawing, and it seems to work out well.
Eagle
(and from the first doodle, I was serious!)