Big companies seem to have industries as their unit of operation. If this is generally true, top leaders have very limited detailed input/output into a specific product itself. Many resources can not be taken into the process of a product evolution. Put it simple, top leaders of a big company usually have quite different direct goals instead of a product. A product's evolution depends on the options and resources a product team can have in a time frame. The rest of a big company is meaningless. The bigger the overlap of top leaders have with the product team, the better chance the product can evolve with the market demand. Jobs comes to my mind.