The bot votes happen anyway. The idea is to get them over with in one minute and then people can vote without needing a stopwatch.
With the increase in curation rewards from 25% to 50% we expect that curation, including bot/autovotes, will get more competitive with more votes during the timer on known authors and more of those happening earlier in the timer. Which means that more of those curation rewards will return to the pool and result in higher payouts elsewhere. It also means that humans will be increasingly shut out by waiting or by trying to jump ahead.
Bots can play their games easily enough within one minute on the sure thing votes and everyone else benefits from both a more intuitive voting experience and more rewards returned to the pool and up for grabs elsewhere.
RE: Curation reverse auction changing from 15 minutes to 1 minute in hard fork 21