The problem is essentially the corporate equivalent of people who post on HN saying they want to make a startup but have no good ideas. If you don't have a vision or value proposition, it is impossible to force it. Simply wanting to be an innovator is not enough.
The problem is even worse if you have management deadlines and bureaucracy. You end up simply picking the top bad idea at the next review cycle and running with it.
Existing companies don't have these restrictions. They can finance projects that take 10 years to pay off, projects that require high volumes to be profitable (no startup could have made the iPhone at that price point), or projects that have a 3x ROI at significant investment.
In return, big companies have cultural problems that can make these things difficult. But it's valuable to have both innovation in big companies and in small flexible companies.
On the other hand, correlation is not necessarily causation.