Okay. You could see it that way. Or you could read what the author wrote about who is to blame:

> No one person or team really made a mistake here, but with the benefit of hindsight it's clear the attackers perceived that the left hand of Debian/Fedora SSH did not know what the right hand of xz-utils was doing.

with OpenBSD not even being mentioned here

I guess it's up to interpretation, but I read it the complete opposite way, as in Linux distributions should not think so highly of themselves as to expect OpenBSD to conform and adapt to their mess, and OpenBSD rightfully should not be expected to "give a flying Fedora about Linux".