The advice to deliberate carefully is useful for beginners and actively harmful for experts. We've misread Kahneman, and smart people are making worse decisions because of it.
Mentors don't give advice calibrated to your situation. They give advice calibrated to their own biography — and then call it wisdom.
We've built an entire culture around the belief that more feedback, more frequently, makes people better. The evidence says otherwise. Most feedback doesn't improve performance—it improves performance on the metrics used to measure performance, which is a different thing entirely.