Am I going to break these hubs by just normal riding/wear-and-tear?

I am 215 lbs and ride lots of freewheel hub bikes, some on touring bikes for for thousands of miles loaded down. On these I keep it at a six speed to keep the axle a bit shorter.
Have bent a 7 speed freewheel axle, but it took a four foot drop off the side of the road that destroyed the wheel to do it. I better knock on wood now.

All my local shops employees under 25 continue to tell me that downtube friction shifters will make me wreck and die, Quill stems all break, and one should never run a tube that has been patched exept in an emergency.