Dogtrousers
Kilometre nibbler
I'm still a bit baffled but I think get the gist.I'm sorry. I got it wrong. I will edit my post to read "Not everyone". Hopefully that makes more sense
You have a maximum physical potential, (which could be measured a whole host of ways) and a commitment potential. Your actual potential is the minimum of these two: If you put in low effort you will be limited by your lack of commitment. But if you train like a loon you will hit a ceiling of your own physical limitation.
Personally I know that my own athletic potential is pretty much nil, so for me treating cycling as a sporting endeavor would lead only to disappointment. But that doesn't stop me from setting different kinds of goals, mainly endurance based which is limited by mental ability to just keep going. So there's a third curve