Your last sentence is a bit sudden, and there is no supporting evidence, but I am letting it go.

Every post I have read from you lately (including the one I was replying to) has had the tone of "This is the correct answer and these other answers are worthless". That's ego of the worst kind.

For a SQl guru to use those packages, he loses his ability to show off his performance tuning skill.

You miss the point entirely. Not every one is an SQL guru. A guru may not use those modules and that's okay. Some non-gurus have similar thought processes as gurus and they may not use those modules and that's okay too. Some non-gurus may not have any thought process resembling what you may call "logic" but (and here's the important part) they understand and will use at least one of those modules and that's okay too.

For Ruby or Python, OO is built-in (as a non-hack), why should anyone create his own OO

There you go again ... assuming that there is only one way to think about things.