From an exercise standpoint, sure, but with sports there is more to it than just maximizing exercise.

If you practice judo you're definitely exercising but the goal is defeating your opponent. When biking or running you're definitely exercising but the goal is going faster or further.

From an an exercise optimization perspective you should be sitting on a spinner with a customized profile, or maybe do some entirely different motion.

If sitting on a carbon fiber bike, shaving off half a second off your multi-hour time, is what brings you joy and motivation then I say screw it to further justification. You do you. Just be mindful of others, as the path you ride isn't your property.