So much that some of the reality stars make it a show or as part of their contracts. 
Except they look ridiculous and many can't chew properly especially some meat afterwards...
Not sure I'd want my teeth ground down to little sticks. Nature works best as it intended, I like my teeth.
I have cosmetic veneers on two teeth that were intact but looked awful, and they're just a layer of porcelain laminate glued to my real tooth. The underlying tooth was polished and filed a bit, but certainly not "ground down to little sticks"; the teeth could have been left as-is and functioned fine.
I also have several full crowns, but they were down because of decay, certainly not for cosmetic purposes. That of course does not mean that you can't do full crowns for cosmetic purposes, but it's usually a last resort before implants.
If you can't chew properly on a crown you have a bad dentist. Nature really does not work best in this case for a lot of us - two of my crowns are in place because parts of the real tooth shattered into several pieces while chewing, others because the damage eventually got so severe that there was too little left to save.
I got it when I was a child (broke the end off when I was ~10 years old) and my gums have receded somewhat since then, so now there's a gap where the base of the original tooth is visible below. I was told at the time that I'd probably need a new one once I got older for this reason, but it hasn't been a problem so I haven't gotten around to it--I'm in my mid 20s now. It's also fallen out twice (once when I sneezed and it skittered across the classroom floor), so now I have an irrational feeling sometimes when eating apples or other tough foods that it's coming loose.
Also note that dentistry tech advances very rapidly; a proper crown done now will be substantially better than a crown done a decade ago, and certainly a lot better than a mediocre one done a decade ago.