IMO experience provides better immunity for common hangups. Generated code tends to be directionally pretty good, but with lots of minor/esoteric failures. The experience to spot those fast and tidy them makes all the difference. Copilot helps me move 10x faster with tedious arduino stuff, but I can easily see where if I didn't have decent intuition around debugging and troubleshooting, there'd be almost zero traction since it'd be hard to clear that last 10% hurdle needed to even run the thing.