I ran goldfarming bots to sell gold a few years ago.
So just want to add to what Convery said.

That although rare, if a bot has been used on your account you take the risk of getting a flagged account for a future ban wave. May it be by a sudden patch and the bot stealth won't react in time, or more realistically, reports from players of bot behaviour and a manual investigation and ban by a local GM.

So I wouldn't suggest botting a character you plan to care about.