> for me this casts serious shade on the whole article
I think that's healthy wariness. The article seems overall well thought out, but OCD is an extremely common blindspot today, so I don't think it spoils the rest of the advice (which is largely good and spot-on).
Even my primary care doctor, when I told him I'd been diagnosed with OCD causing many disparate kinds of anxiety and depression, said something about "well you want your accountant to have a little OCD for example." I was a little stunned!