Bob Ross did a TV show targeting hobbyist painters. He never presented himself any differently. He had a nice, low-key style and was relatable and completely non-threatening and non-judgmental. And he worked fast enough to churn out a reasonable, decently large painting in each episode, all while cooing softly about “a nice little tree” as he bashed it in.
Was he painting for the museums? No. Did he paint for the art galleries? No. He painted for his audience of painting hobbyists. No artists watched his show for technical or stylistic tips, or else did so with a kind of amused, vaguely horrified fascination which could also be really entertaining in itself. Did Bob need any approval from other artists? Clearly, he did not.