Cheap 3 axis CNC machines are very dumb (I broke a home built machine once because there were no end stops and I programmed it wrong (stepper motors are very powerful)).

And there are professional CNC machine costing waay more than this robot.

I think you are comparing apples with oranges. The price is also for a development kit. So I can imagine the price could be at least half if they sold a few thousand of them.