This is true and is made clear by a statement on this forum from Zach Kaplan (CEO).
You can use a laser quite effectively with the appropriate software.
there is a switch on the laser control board that is used to select CW (continuous wave) or TTL. That switch needs to be in the TTL position for computer control.
For best results you need to use a version of grbl that supports lasers. Since you are just getting started load this version of grbl into the X-controller.
After you get it all working you can move up to the complexity of using a laser with 1.1f