Or just buy a shovel.
in my country, guns are not so hard to buy, but the bullets are very expensive and not easy.
True, but most people don't know how to operate them. They aren't all that complicated, but considering how many people have difficulty operating a mouse, I'm not confident there are all that many people who would figure out a CNC machine.
CNC isn't that simple.If the person is not able to insert a flash drive and hit start then forging a shovel head into the proper shape welding the parts drilling holes as the exact needed locations is much further off the table for them...
CNC isn't that simple.
And somebody has to write the data on the flash drive.