Complete bollocks. I spend my entire youth standing up for myself against severe and constant bullying, and it never did a damn lick of help for me. This contrived and constantly spouted "if you stand up for yourself, people won't harass you" idea is... to put it bluntly... utter bullshit.
Maybe they meant that whether standing up for yourself ameliorates the situation on the ground or not, you're probably healthier if you do it than if you don't.
4w5 6w7 1w2 sx/sp ⯮ ISFP
RLOAX (don't do it) ⯮ Melancholic Hufflepuff
A lonely island where only what is permitted to move moves, becomes an ideal. Jung