I no longer teach law. But when I did I advised my students that they should never accept a case if it meant that by doing so you couldn't sleep at night.
One lapse of judgment can cost and talent isn't everything. A huge slice of good fortune in needed to make it to the top, and without that element of luck, you've no chance.
If you are a gun manufacturer, the product you make is not subject to safety regulation by the Consumer Product Safety Commission. Toy guns are subject to safety regulation; water pistols are, but not real guns.