Tanks initiate fights, not win them alone. Jumping in before your damage dealers are nearby leads to instant death.
Building pure physical defense against magic-heavy teams (or vice-versa) makes your tank melt instantly.
Diving when heroes like Eudora, Gord, or Yi Sun-Shin have ults ready is suicide every time.
Standing too deep or too far from teammates exposes you to burst damage with no peel or support.
Tanks who face-check bushes without information get chain-CC’d and deleted before their team reacts.
Wasting or delaying survivability spells reduces your escape options and gets you killed early in fights.
A tank must protect squishy allies. Chasing kills instead of peeling exposes you and the team to assassins.