I don’t know, maybe the fact that a regular one players single character has to fight 2-5 characters also controlled by a single character running a macro on their rotation.
People did this same trash in games like UO pservers and attempt it all the time on eq p99.
It sure is fair getting one shot by a dude controlling 5 tamers all spamming all guard me while they all syncronize shoot you
Theres a reason reasonable games ban it.