> All experience a monumental retraction the likes of which our economy has never experienced the moments ads go away.
Such hyperbole; computers are embedded in every aspect of daily life now.
Moreover, even if by some miracle you happened to be correct, propping up the adtech software industry does not justify its negative externalities any more than preserving tobacco jobs justifies the continued sale of cigarettes and subsequent deaths or preserving coal jobs justifies the pollutants produced and its subsequent deaths.
It's that there was a thriving core decades ago that supported a fraction of the people the software industry supports today.
> Plain old business websites, line-of-business internal software, desktop apps, embedded and IoT software, etc.
All experience a monumental retraction the likes of which our economy has never experienced the moments ads go away.
No industry, let alone some niche in tech, would be unaffected if Google and their ad-revenue driven efforts dried up tomorrow morning.
If you can't see that there is plenty fewer things to do for the economy to do if ads are curtailed, you need to broaden your horizons.