I wouldn't blame it on the people but on the environment. I have worked at both big companies and startups. In a lot of big companies it's actually quite hard to make a difference. There are lots of people who can say "No", raise concerns, ask for plans, but not many people who say "Yes". So after a while people learn that it's not worth the effort.
Big corp introduces a constant uphill battle and people get minted to avoid conflict (Why do you want to spend money on a subject that is not on your bosses boss roadmap? Does this new service obey our IT-compliance-rules? I know a virus scanner on Linux is a bad idea, but compliance demands it. I do not care about your threat model, have you installed one already? Can you spend 30,000 Currency Units, but have it billed in November, accepted in December, and paid out in January next year? Answer me until end-of-business!).
People want to have an impact on their environment and conflict is the wrong way to start with.