The same could be said about the stimulation spikes before 2000 and 2008. Short term gains != Long term sustainable industries.
Also, the gains have literally come because of the investment in smart immigrants in the 00s. That gave fluidity in the hiring market, allowing megacorps to expand rapidly while other countries couldn't. They just didnt have so many smart employees.
The impact of today's immigration policies will be felt 5 years from now