Today’s juniors still learn the same core skill, the abstract thinking and formalization of a problem is still there. It’s just done on a higher level of abstraction and in an explicitly formulated natural language instead of a formal one for the first time ever. They’re not even leaving out the formal one completely, because they need to integrate and fine tune the code for it to work as needed.
Does it introduce new problems? Sure. Does it mean that today’s juniors will be less capable compared to today’s seniors once they have the same amount of experience? I really doubt it.