Then I simply disagree with your framing of "everything that goes up must come down", which seems to ignore the existence of downturns and hiccups, and "tech workers will continue to be in increasingly high demand", which would be a much more questionable statement during such a downturn or hiccup. Such an economic slump would not be a pleasant time for anyone, even tech workers. It is good to be on guard against such an eventuality.

It’s also quite the fallacy to compare overall economic growth with one sector, or even one region. Ask how the Rust Belt has been doing these days in comparison to when Detroit was at its acme.