I remember the time when kids considered bots cool, and I had no idea about programming then, nor did I understand how bots were usefull.. But the problem is I

I remember the time when kids considered bots cool, and I had no idea about programming then, nor did I understand how bots were usefull.. But the problem is I dont understand not even today who would be interested to interact with a bot? And how is this service better than employing a programmer ? Some examples would be useful.