But let's get started on this mess of an argument you managed to conjure up. People pre-potted for the same reason they pre-pot now. But you could use multiple potions in combat back then so it didn't matter as much. You were actually expected to use multiple pots in a fight anyway so what point are you trying to make?
DPS didn't do max DPS by default I'm not even sure you thought about this before you typed it. I'm also sure you didn't even get the point I was trying to make. That back then it didn't make sense to ask your tanks to try and do more DPS for the same reason you didn't ask healers for more DPS. It didn't make a difference at all. You were better off just pushing more DPS out of the players who were already DPS to begin with because they could do a lot more than a tank could. That is the point I was making.