What happens if they attack the wizard instead? Is he the "tank" now? Whoever gets attacked is the tank? In PnP, no self-respecting DM will go along with the MMO bullshit and the enemies can and will gleefully ignore heavily-armored characters who barely do any dmg.
Okay, I see what you saying. I never really noticed my strategy changing or paid attention to how enemies target my party because my battles were more or less the same
Xoti and Aloth stayed back and the other 4 party members did most of the fighting but there were times where enemies came from the back and attacked Xoti and Aloth or enemies attacked from the side and ignored my fighters
I understand what you saying is technically correct, there aren't really tanks or aggro anymore
Im saying my combat strategy still used the tank concept as much as I could implement it