I get your argument, but Jerry's right. Your average consumer doesn't even know what version of Android is the latest, let alone whether or not they're running it unless they've got a techie friend telling them.
I know it's frustrating to "us" when it happens, but I don't think it's nearly as big of a problem in the "real world" as it appears in the vacuum of the vocal Android followers on sites like Android Central.
You mention Apple getting everyone excited about updates, but the truth is Google doesn't "advertise" new versions like Apple does. And, frankly, when Google does put out a new version it usually includes a lot
more new functionality than any new version of iOS that I've seen in recent memory ;)