MichaelRazum, you're hitting on something crucial many of us in the trenches are seeing. The "code is cheap" mentality, as you call it, leads to bloated, unreadable code. As baCist points out, if AI starts training on its own generated code, we're headed for a real problem with quality degradation.
I've found experienced developers leverage AI as a force multiplier because they can scrutinize the output, unlike juniors who often just paste and move on. The real skill is becoming an AI orchestrator, prompting effectively, and critically validating the output. Otherwise, if you're just a wrapper for AI, then yes, you become the "legacy developer" you mention because you're adding no critical thinking or value.