Yeah, after reading the other comments in here, you should be able to re-read that page and see it’s not the best advice.

Top Tip: if you’re testing things, you’d modify PATH in the current session first, check that fixes the problem and only then modify any environmental files like .bashrc, etc. so if something got borked you could just logout and in again…

That page reminds me of Windows self-help pages that ask readers to defrag the harddrive in order to get a printer working.