The only fool here is you. And a snob to boot. I have owned big whites and now I have an 800 f/11. Because I know how to get the most out of my equipment, and my money. These lenses provide options that were absent before. You can derive a sense of superiority from denigrating them, some of us will get on with taking good photos without the limitation of narrowmindedness.The lenses you mentioned above certainly have a correct sharpness, but selling lenses at F11 is making fun of your customers... and only amateurs can be fooled and buy such equipment. At F11 you need a lot of light to take pictures and since wildlife photography requires high shutter speeds this really won't work well.
In my opinion it is better to save a little more and buy a higher end lens than to get ripped off by buying a lens at F11. Canon is really taking its customers for fools and /or cash cows if you prefer this metaphor.
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