Why was I not warned?

Those of you who follow me on Twitter (that is, none of you -- I'm pretty sure no one actually reads this blog) know that I had some car troubles yesterday.  On the way to school, I started to feel a slight sort of bumping, off to the right side of my car.  Then it started to get worse.  Then it continued to get worse.  I pulled off to the side of the road when it started to feel like I was driving a train. I got out and checked, and the front passenger-side tire had become significantly less tire-like around the bottom part.  It looked a bit more like a sheet, actually.

As it turns out, eventually, when tires wear down enough, they reach a sort of steel mesh state, shortly after which, they explode.  This appears to be what happened to my right-front tire, and my left-front tire has a similar degree of exposure.

It seems obvious to me that it's clearly someone else's fault that I had no idea how to take care of my tires.  Not mine at all.  Obviously.