I think you've hit the nail on the head. It's not essentially the effort, it's the satisfaction. The former is the means, the latter the ends. If something is s

I think you've hit the nail on the head. It's not essentially the effort, it's the satisfaction. The former is the means, the latter the ends. If something is satisfying then the effort seems worth it. If using a push-bike satisfies you then carry on. If you have only five minutes to catch that train and the push-bike's not going to get you there on time, then use the e-bike and catch that train. That's satisfying too; this time as an outcome, but still satisfying.