What did instance locks solve exactly?

the solution is and has always been 2 things.

hiring competent GMs.
developing bettter anti-cheat software.

but. activision is operated by a bunch of cheap idiots so that will never happen.

Botters was supposedly the big thing, particularly the ones that would spam dungeons for hours. (I remember one around that time was dozens of botted mages in Stratholme: https://www.reddit.com/r/classicwow/comments/eyniat/bot_groups_farming_righteous_orbs_in_stratholme/ )

Blizzard more recently mentioned that part of the goal was slowing the ramp-up for bots, that they can’t jump into spamming dungeons for high profits quickly before being suspended.

What the heck does the color of his gear have anything to do with this conversation?