What you appear to be missing is that (if AI coding is as good as we are told) there will considerably more people with the business knowledge to drive an AI to create their solutions.

The bit that made developers valuable was the ability to actually implement those business rules in software. You will be competing with all those laid off devs as well as those non-developers who have all that business knowledge.

In simple terms, there are two groups of people:

1. Developers, who have some business knowledge, and

2. White collar workers who have no development knowledge.

Previously (or currently, say) the supply of solutions providers came only from group 1. Now they come from both group 1 and group 2.

The supply of solutions providers just exploded, you can expect the same sort of salary that the people in group 2 get, which is nowhere close to what the people in group 1 used to get.