That reads as reasonable to me, but raises a subsequent question: if these lapses are so common and so many countries possess the capacity for serious mistakes, why don't we see more regular outbreaks (if not full-blown pandemics) caused by labs? In other words, what makes COVID special? I didn't find a satisfactory answer to the latter question in the article.
It's my (uninformed, uneducated) opinion that the severity of the author's claims don't correspond to the reality of the last few national and international disease crises (AIDS, Ebola, Zika, COVID). Which isn't to say that we should absolutely dismiss the possibility that COVID originated in a lab, only that claims that it did amount to currently unsubstantiated claims about COVID's special status among other recent pandemics.
It's purposely evolving diseases to spread faster or be more dangerous, for the sake of research. As I understand, it's at least a bit controversial. So maybe there's not as much of it going on as other research? If so, there probably wouldn't be as much opportunity for it to escape. But now that it has (per the hypothesis), it's ready to be very contagious right out of the gate. Thus, pandemic.