You probably are not overestimating the pandemic's impact, and I think the author is slightly overstating WWII's impact.
I say slightly overstating because you can't stop at WWII, you have to also go back to view what lead to WWII, and why was WWII so impactful. Would it have had the same global impact had Japan not bombed Pearl Harbour?
Could the Cold War have occurred without WWII? If the Cold War didn't materialize, would the US have developed the Apollo missions? Without the need for high quality small transistors for Apollo, would the modern computer age have developed as it has?
The gist of what I'm saying is that I don't believe you can take any of these things in isolation. The Butterfly Effect is real.
Having said all of that. I believe this is an excellent article in viewing the impact of events.