And that is why there are a lot of Robbie accidents, esp R44: Low cost helicopter meets low experience pilot flying in a low discipline environment.
Every pilot has started to fly without experience. I think that it's not about experience, I think it's about discipline. I do know my limits, they depend on my experience on type, my recency, my overall experience, fatigue, stress etc.
If you know your limits and only fly missions within your personal flying envelope, you're professional
If you want to fly out of your personal flying envelope you are taking chances.
Experience doesn't change that. Experience expands your personal flying envelope but does not immunise you against accidents.