Earlier quoted context omitted.
How fast would you be able to switch the industry you are working in? I would guess that a lot of the jobs that are discussed in this thread are fairly specialised ones and if that industry would disappear they would be out of work.
The economic re-allocation doesn't have to be overnight or even in a single decade. It isn't as if the revenue suddenly goes to zero and the industry is nuked.
That is an awful lot of time wasted of their lives.