So it is making it more sporting to the animal

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Only joking of course.

I don't think anyone should be needing sticks on a buffalo at 20 yards. However one at 150 yards may be a different propositions. Also what about a 100 yard shot at a dik dik. Small and medium game are also relevant. Your examples are fine examples of off-hand shooting. Most people are not capable of doing that consistently.

I agree using some rests like a Harris Bipod are so steady it doesn't feel sporting, more like bench shooting. These products have their place too though. I like to use mine for head shooting hares in long vine rows.