[Erlich_Bachman]

In one case you have to write two lines, because you care about the business logic. That's two lines to maintain, debug, explain to other programmers, staticaly check, etc. etc.

And instead you want to switch to what? Writing 20 lines of that same logic + implementing stuff that has already been better implemented in all of the libraries, by better programmers (because they were able to focus and specialize on that one thing)?

For what? A 2% increase in wall-clock speed? There is a 1 in a hundred applications where this matters. What matters in others is maintainability and development speed. Development is expensive. CPU time is cheap.