Three reasons monitoring troubleshooting and updates.
A printing job can take hours to print and a fail could cost a day or more. Being able to monitor means you can correct thinks quickly Obviously if you are 200 miles away that's not going to help, but 2 miles away is a different situation.
Troubleshooting problems takes time and costs money being able to log in and have a look around will save time and costs. Perhaps even prevent an expensive service call. In general for CNC Equipment a service call will cost at least $500 and can easily be 10 times that.
Updates can be sent remotely and can minimize support requirements.
AC because I work in the industry.