Bolt on cogs

This puzzles me. In my short time reading this forum I have learned that a belt drive would not be strong enough for fixed gear riding, even though it is strong enough for 1000cc+ motorbikes and 3 piece BMX cranks won't stand up to the rigors of commuting.

actually it's just the illusion of it being made out of rubber, and rubber = stretch thus stretch = break, therfore weak.

but it's made out of plastic (I think?) and are extremely strong, it is strong, just people can't really see it being that strong due to the illusion i mentioned above.