There was a time when tech talent would uproot their lives for the US because it offered collaboration, publishing, company-building and a big conference circuit. Now they run a gauntlet at the border, where even a green card or citizenship does not guarantee they will not be hassled.
Thus it can be seen how when industries aren't mitigated in their self defeating behavior by unions, the associated job market and domestic industry can be driven to collapse and there will be zero ability to slow the process down once it begins spiralling.
Unions, even if you are a super smart techbro who understands EVERYTHING about the world better than other people because you understand computers... you still need Unions or else the company you are working for will inveitably blow itself up and leave nothing but a crater behind.