Whatever the views are about MBFC, Tesseract integrated it better than LW's bot. If you don't like MBFC, it's just an option in your user settings to turn it off for Tesseract, whereas the bot caused a bunch of problems that weren't even related to concerns about accuracy and bias. Drive-by bots can be annoying, because it leads people to believe there's legit content where there isn't, and not every client respected LW's bot use of spoiler Markdown, so they ended up with a massive comment from it that dominated the screen.