I've been deep into AI full-time professionally for some months now, and for the first 4+ weeks I felt the exact same way as you describe - it is a form of existential crisis, especially after spending the bulk of the past 25 years honing my coding-fu algo ninja skills, my identity was totally wrapped up in it.

Keep at it and keep leaning in to embrace it, I promise it gets better! It's just a big adjustment.

You are FAR more than your code!