Anybody who's really successful has doubts.

Bruckheimer’s remark reframes self-doubt as a feature of genuine achievement rather than a defect. The idea is that people who operate at a high level—especially in competitive, high-stakes creative industries like film and television—remain aware of uncertainty, risk, and the possibility of failure. Doubt can signal seriousness: it keeps complacency at bay, encourages preparation, and pushes a successful person to keep revising, testing, and improving. The quote also implies that confidence and doubt coexist; sustained success is less about feeling certain and more about continuing to act, decide, and create despite uncertainty.