So why the heck did Canon "cripple" the 5DIII by omitting so many features? Why doesn't the 5DIII have fabulous built-in creative filters like Toy Camera and Grainy Black & White? Is Canon just being greedy?
This is the first time I've heard anyone complain about this feature, and it is in jest. I agree that it is possible for a feature to have zero or even negative marginal value, and that in-camera art filters on a pro body would have no or negative marginal value (if they were high enough in the decision tree to be accessible they would have a negative marginal value because of the resulting clutter, otherwise it would be about 0)
I don't agree that AFMA on rebel bodies is such a feature.
For one, AFMA is completely usable even if it's buried under layers of menus, because it doesn't need to be manipulated during day to day shooting -- it is only adjusted in controlled (e.g. non time critical) settings. Even on the 5DII (for example) it's buried in a 3 layer menu (go to the right tab, then select AF/other, then select micro adjust).
I don't understand why putting that in the Rebel would overly complicate things. They do already have equally confusing items (e.g. such as a two axis white balance adjustment which would have even many advanced users scratching their heads)
Art filters by contrast in cameras that have them tend to occupy spots close to the top of the decision heirarchy (sometimes they are actually hardwired into the manual controls which would be incredibly annoying for most 1D and 5D series users). They need to be done this way to be quickly accessible.
Of course, different users have different expectations.
Of course, but my point is that one of the reasons people buy inexpensive cameras is because of budgetery constraints, not because they are unsophisticated users.
I do agree with you that Canon's point of view seems to be that the Rebel line is unsuitable for the more sophisticated user. A savvy user on a budget probably shouldn't buy a rebel.
I simply don't believe your contention that Canon's reason for omitting this feature from their Rebel (or there XXD bodies from which it was removed) is to avoid adding "unwanted features". In fact on the contrary it looks like the point is to send a message to advanced users who might otherwise purchase rebel series bodies that they really should step up and buy one of their more expensive offerings.