Why? Because things go wrong all the time. We spend endless hours fixing some extremely strange bugs that turn out to be a simple typo. Some tool might not be working just because a library got a minor version upgrade. Or the system crashes because somebody forgot to add a file to git. The list can go on and on.
Chatbots are a bet that we are going to be spending more and more of our time within messaging apps like WeChat, Facebook Messenger, Kik, Telegram, etc. and that it will be easier to access the services we want via a bot within those apps than to jump into another app or use the web. This is already proving to be the case in China, where a huge number of WeChat’s 650 million users spend an enormous amount of their time within the app. They’re not just spending that time chatting with friends, they’re also accessing a whole range of services within WeChat itself, including shopping, virtual friends, games, etc.