Because they are still making the same salary. In 5 years, when their job is eliminated, and they can't find work, they will regret their decision.

> it could also be that these software jobs won’t pay as well as in the past, because, of course, the jobs aren’t as hard as they used to be. Acquiring the skills isn’t as challenging.

This sounds opposite to what the article said earlier: newbies aren’t able to get as much use out of these coding agents as the more experienced programmers do.