The bolt will snap, bend, shear, whatever the heck else you want it to do. Expose ANY piece of rubber to the elements and it will fail. Given, it may take a while, but it'll fail none-the-less. Now add the stress of off-roading and combine that with rocks, mud, heat, cold, ice, snow, etc. and you get the point. I didn't say/state/write/type that I didn't believe you. I was merely giving an opinion and ranting. Personally, I think it's friggin retarded and you should have your balls cut off if you lift/raise a vehicle with a hockey puck.
But since you called me out... Which flexes more? Rubber or a piece of plastic that will withstand tens of thousands of pounds of pressure per square inch? Rubber will every time. Try to literally crush a body lift block with a vise and... Oh yeah, it won't collapse. Try to break it? Still won't break. I'm not an engineer or anything, but columns withstand more pressure than most anything else (triangles are a diff story). They're used under bridges, in buildings, in lots of things. Point is.... That "plastic" is stronger than your hockey puck. Did I mention it's really hard to get a BL to break into pieces??