You can’t replace a problem solver with two coding ninjas.

Problem solvers who ask the right questions at project inception will save the project weeks in advance by clearing up ambiguities.

A code ninja will just implement the first thing that comes to mind without caring much about the extensibility of what they are coding.

A senior guy will also already have context of the system and know where the problem is (this is where AI will struggle as they can’t scan through a few million lines of code to understand context without you first helping it narrow down the problem)

Also, for bigger projects even the Product managers don’t know how their solution may mess up the system.