About safety. If the hose connected to the compressor comes lose,or melts; what is the worst thing that can happen?
In a robot, in the arena.In the worst case you have a constant battery drain, gears turning, and some air flowing.Remove the link, no problem anymore.
The realy badest scenario is simple.Testing at home,and the pressure going to high.A bursting pipe at 300 psi is some shrapnell.Now, if you adhere the safety rules about pneumatics, like fitting a pressure relief valve rated at the right setting.Then even that isnt a problem.

So, the FRA rules protect you even at home.If you follow them.