Next time your guild goes against an 80 member guild watch a tile that they start and see how long it truly takes them to clear it. When large guilds take tiles in an instant they have majority of their players on at the same time. They use means such as discord to coordinate their efforts. There’s multiple ways to ensure guild members know when they are needed.
Sure, bots can be used to take tiles in an instant. But those using them would have even shorter times in GBG due to maxing attrition or running out of troops. If these larger guilds are pushing all the other guilds around 24/7, then they either coordinate extremely well with when each player deploys bot’s or they simply do not use them.