This simply isn't true.
Agreed. You also have to look at the historical evidence, which shows that Canon updated the firmware to enable manual exposure control in the 5D2 as a direct result of user requests to do so.
IFYP. Firmware updates are intrinsic to almost any device that has programmable firmware, from computers to mobile phones to...guess what, cameras. Otherwise, there would be no point to using firmware, and all such devices would simply use ROM as they once did.
Don't listen to people saying that asking for extended features via firmware is fanciful thinking or being whiny, or that one has to accept the reality of newer products getting newer features. These people are living in the past and do not understand how modern consumer electronics have overwhelmingly adopted the firmware model of product development. They are ignorant of how the increasing complexity of such products has made firmware a virtual necessity. We are not talking about hardware. No one is expecting Canon to retrofit the 5D2 with the 7D's AF system for free. We are talking about code that is by its very nature designed to be rewritten and extended over time.
Also, people are missing the point when it comes to consumer feedback. So what if we call up Canon and want to suggest new hardware features as well? It's not like any rational person is asking them to change their existing hardware for free, unless it's a product defect. Canon has specifically pointed out that the very existence of the 7D, as well as its hardware feature set, is a response to consumer input. It is never a waste of time to tell a company that creates a product you care about, how to make it even better.