In a work setting, sure, but I don't think that's what this article is about

And of course there is always only one tool that solves any given job.

I think for any given job there's a tool thats likely best. If you hire me to paint your car and I show up with a paint brush you're probably not amused, because you know that it needs to be spray painted. If I hire you to program a microcontroller and you try to use Ruby..

I don't normally comment on my score since thats a downvote brigade waiting to happen, but the amount people are offended by the idea that choosing tools has more to do with the project than personal taste is amusing!