No, mine apparently don't.
Although to be sure, there are a few sections that looked low contrast to me. When I checked them with a WCAG altorithm contrast checker, they all easily exceeded AAA limits.
I concluded that the page might have been intending to show that you still had a lot of flexibility in color choices, while meeting WCAG standards. (The WCAG standards are mentioned on the page).
Of course, it's possible the WCAG algorithm/standard is at fault -- it is hard to totally capture human perception in a measurement (not to mention different humans are different), and there are other times I have had color combinations that I find hard to read but which pass the WCAG measurement.
But the WCAG standard is, again, mentioned on the page, with no disclaimers.
I think there may be something worth talking about going on, but I'm definitely not convinced it's what you think.
There are sections of the page that _say_ they are showing you screenshots of _other_ people's pages that are too low-contrast, that part is clear. But you are convinced sections of the page itself with the authors words are supposed to be obviously hard to read due to contrast?
Maybe. I guess we'd have to ask the authors. Seems a weird choice to me, to do that without mentioning you are doing it.
But either way I still am curious if you wanted to identify which sections of the page you are identifying as deliberately too-low-contrast. I'm curious if they are the same ones that looked hard to read due to contrast to me, and I'm curious how they do on the WCAG metric (I didn't look for every single section myself).