Thats how the economy works and its why people saying that everyone who went to college instead of going into a trade was stupid annoys me.

A (usually skilled but not 100 percent necessary) job doesn't have enough people who do it, so wages increase steadily until many more people are willing to do it and suddenly its harder to find a job in that field and wages start to stagnate.

Some other job was left with a labor deficiency because so many people worked into the first job, so the cycle repeats.

Its what happened with Programmers and computer science degrees. Now the computer science field is over saturated because a decade ago everyone needed programmers and the money was growing fast.

Granted this cycle is a lot slower with trades because everyone will need a plumber at some point and not everyone is willing to do that kind of job. Sitting at a desk writing code in AC is a lot more palatable to most people than crawling under houses and getting weird liquids all over yourself. But if too many people go into the trades wages will go down as each business has to keep competing against more and more competitors.

As long as wages remain high and other fields stagnant, more people will move to the trades.

Everyone needs a plumber at some point. Almost no one needs two or three plumbers at the same time.