The dead pedal is actually pretty solid.
The two bolts that are used to mount it don't hold all the weight that you exert. If you look at the back of the dead pedal, there is a L-bracket welded on to support your weight when you press down. Also, with the way that the dead pedal is mounted to the car, when you press on it, the pedal will be pressed towards the vehicle's panel, therefore, the 2 bolts are not seeing as much forces as you may think.
Also, the dead pedal is made out of a pretty thick gauge of steel, it is not easy to bend / deform.
In other words, you have nothing to worry about
