LOL...so do bikes. Don't you see all the death stickers on bikes these days? Riding can cause death. Not having your quick release properly set can cause death. Etc.

Older guys like me rode/raced with toe clips with cleats nailed into the sole of the bike shoe. If you were racing and crashed, you did not separate from that bike. Look at some old cycling films of crashes and you will see guys laying inthe road waiting for someone to release their feet from the pedals because on the ground they could not reach.

So, to summarize, it's wasted energy riding any pedal system that attaches you to the pedals.

Got it.

I rode with an acquaintence who was on platforms. We were climbing a hill, he stood up, his foot slipped off the pedal driving his toes into the pavement, the crank came up and caught him on the back of the leg and snapped his ankle. I was glad I had a cell phone with me.