Damage during Taric's Ult, bad mechanic for both teams

Dealing damage, or not dealing damage, however you want to look at it doesn't give assists against someone affected by Taric's ult. While this is game wide and not a big issue, the other side of it needs to change. If a Taric ults against an imminent tower dive, all attacks against him and his allies don't register as actual attacks meaning the attacker doesn't take tower aggro. There is no reason that an ultimate ability, or any ability for that matter should assist the enemy team when used for its intended purpose.