Obviously there's bias involved, but I really don't see a reality where this isn't the case. I've literally never worked at a company where half the team could be laid off and the product would
still function at its
current level of functionality for 12 months; let alone adding functionality. If you've worked at a company like this; I imagine there are some; then sure; the lights could be kept on. Hey there Oracle & IBM 2.0.
Then again, you (the company) just laid off hundreds of extremely talented engineers with few other marketable skills except "the industry you trained them in", you've been paying them insane salaries, they're just going to turn around and compete with you, except now they've got a clean slate and have learned from all the mistakes that caused them to be necessary in the first place.
The well paying, large companies are literally 7 of the 10 largest companies on the S&P. Oh, and by the way, one of those other 3, UHG, they have... 850 job openings with the word "software engineer" in the title; about 15% of all their openings. Johnson & Johnson, they're on there, 300 software engineering openings, out of 3000 total. Berkshire is also on the list, harder to get their count, but you get the point; software is EVERYWHERE.
I just... don't get it. I don't get how someone can believe what the grandparent believes. I mean, you can argue a more measured stance, that the outlier 99.9th percentile salaries we've seen in the past four years are probably going to stagnate. Maybe; I'm not convinced of this, but its a reasonable stance. You can argue it'll be harder to get into the industry, as companies want experience and not coding bootcamps; I'd bet on it. But to argue that tech companies don't need 50% of their employees, when they're the plurality of the wealth of the United States' public markets; its comical. Where else did that wealth come from, if not their (tech) employees? If the argument is they're overvalued, maybe, but that's speculation; buy Puts if you believe it, but I'd buy Calls on "you won't".
Then again, maybe the grandparent is talking about non-tech roles in tech companies? I can't tell; and moreover, I don't think even they know what they're arguing for.