Yes, they have systems to learn this way, but it assumes the environment is controlled (always) and the task identical (always). Lots of automation works this

Yes, they have systems to learn this way, but it assumes the environment is controlled (always) and the task identical (always). Lots of automation works this way, but it actually limits the applications quite a bit. A robot that can safely work along side people (i.e., a "cobot") and adjust to environment changes and changing work patterns is a whole different beast.