If Thing B is better and cheaper than Thing A, people are going to use Thing B until it runs out. Consequently, people are going to make more Thing B. In the sh

If Thing B is better and cheaper than Thing A, people are going to use Thing B until it runs out. Consequently, people are going to make more Thing B. In the short term some jobs are safe only because we don't have enough Thing B, temporarily. But that's not the reason to claim "we are safe don't worry!".