You're overstating the importance of bots.  The only inherently bad or unfair part is when they outbid you purely based on speed and get a deal you wanted.  Otherwise bots do precisely what a human tells them to so they can program it to trade fairly or like a jerk.  A human can manually set up unfair trades and scams and that sort of thing, just not as quickly.  So really the bot isn't that important.