Automated tweeting is allowed as long as it's not spammy or harmful. I think the bots the normally refer to are those that auto-like posts and retweet peoples content for a fee
https://help.twitter.com/en/rules-and-policies/twitter-autom...
https://help.twitter.com/en/rules-and-policies/twitter-autom...
Yes because I'm probably allowed to do everything on Twitter that the billionaire owner of Twitter is allowed to do. OK that was sarcastic but I see what you mean.