Also from someone who has towered before, in a 5k/10k.
Even the extended hours past 1k included, GST is much harder. Usually now when a tower guild goes for 1k, they make alliances with all of the other "major" guilds, and they agree never to attack each other and just sit and hold the tower for 1k straight. 80% of the time they'll probably be dealing with 1-3 pkers in their tower, held off by 14+ members roughly. That honestly does not sound difficult at all, even objectively. It just sounds like a reward for how many hours spent in a certain level.