You're absolutely wrong! It does not yield the "same output", and here is why: if you cause your command to actually produce output on stderr (fd 2) it will ap

You're absolutely wrong! It does not yield the "same output", and here is why: if you cause your command to actually produce output on stderr (fd 2) it will appear as terminal output, because you have actually succeeded in "redirecting" stderr to wherever stdout (fd 1) was pointing initially.