Edit: it all depends on tone... I still read the comment with the tone that implies disruptions as being as negative as they are positive, whereas I would frame disruptions are more positive. Granted, that's not to ignore the countless people who have had their lives uprooted by not being able to keep up with fast moving societies.
I don't think he does, though. I'd be much quicker to say that other people frame the disruptions as though they never had significant downsides; I constantly see people saying "most people found new work eventually without too much of a pay cut" as though that implies no one suffered.
More theoretically, we ought to be capable of imagining some net-positive change which causes front-end disruptions so devastating that we can't endure through to the positive result. Imagine rendering 50% of people unemployed in one year and ask whether they would all quietly drift into new jobs, or whether they would set all the data centers on fire and cancel out the progress.
I don't think things are that bad, but pretending a long-run positive exempts you from planning for short-run harms is pretty unfair.
I can't say with any certainty that we're definitely better off than if WW2 had never happened. Suppose it had not, and that there had been slower technological development without the necessity of war, so that in 2017 the cutting edge of technology was 2400 bps modems and 300 dpi laser printers (ie a ~25 year technological 'peace handicap'). Is the actual progress we've made over that period worth the ~50 million lives lost in WW2?
Put another way, would you be willing to kill 100 million people now, today, in order to take a 25 year technological shortcut (with no certainty about how well it would pan out)?
Many of the advancements you speak of had nothing to do with war time even, they were made by private companies building things like faster and faster microprocessors.
Yes, war spurts technological advancement, but not in all areas - it might be more realistic to compare something like rockets or nuclear power.
"At one time there were more British soldiers fighting the Luddites than there were fighting Napoleon on the Iberian Peninsula."