There are plenty of things considered robots that follow a preset sequence and don't directly respond to their environment. For example, animatronics at theme

There are plenty of things considered robots that follow a preset sequence and don't directly respond to their environment. For example, animatronics at theme parks, in movies and at certain types of restaurants are types of robots, and none of those act outside of a fixed pattern. The type of robot used on Robot Wars or Battlebots doesn't really perceive its environment, and acts closer to a typical drone. The automatons inventors used to make before computers became a thing are often considered robots. Really, the definition of a robot is pretty vague, and usually along the lines of 'a machine capable of carrying out a complex series of actions automatically'. Or maybe not.