Good explanation Merk.
When the creeper is used within its designed capabilities, it'll be fine. Start adding power, bigger tires, pulling excessive weight, etc is where you find the weakest link.
At one time, I had a 122 with creeper and a 125. Personally I liked the 125 ( hydro ) better. I had slow when I wanted slow and faster with a push of the lever.
That said, it's also why they make chocolate and vanilla ice cream
