The article talks about how you can start building a relatively small online presence that can give you a leg up in job interviews. It doesn't say that any kind of online presence will do that.

To offer an extreme example, if someone were to put up a website that advocates for child cannibalism, and then didn't get a tech job as a result, I don't think it'd be credible for them to say that their website refutes this article's point.

As an aside, your comment that any work environment that might object to your views must be "sterile" is yet another piece of supporting evidence for why you might have trouble finding a job.