Why should that surprise you? If you're uninsured, you'll pay a small fortune for any medical expenses you might incur. (Hell, you'll likely pay a small fortune even if you are insured).
Hence, someone who's uninsured should take a pretty keen interest in maintaining and improving his health. I mean, obviously we all should. But for the uninsured, a health problem is also a potentially catastrophic financial problem.
"I find the idea to screw up your health because you're "insured anyway", well, disturbing"
I think that's a misinterpretation of the article.