I'm not saying there's nothing in it, but I found the body of the article fairly insulting, along with the title.
I think those are mostly good things to understand as a foundation of your skillset and how you should think of your role, but it's full of hard 'DONTs' that I don't think are at all universal, even within the confines of a given genre.
I think it's more helpful to say 'understand your skill level, and play in a way that is appropriate for the situation'. Playing little fills and slap solos and high chordal stuff and using 'too many' effects will all sound bad if you aren't any good at them. If you're a novice slapper, it'll probably sound lame as hell if you do a little slap comping between songs, but I think it's a dangerous statement to make about all bass players.
JimmyM wrote a beautifully impassioned post a little while ago that, to me, was the antithesis of this. It said be your own bass player, and don't rein in tendencies to learn things that this article speaks against just because some people would have you believe that's your role. I don't want to put words in his mouth, and may have misinterpreted, so I'll leave it at that. I guess all I'm saying is take this as a primer for a new bassist, or maybe an occasional refresher for a seasoned bassist, not the definitive limits of your role in a musical context.