Sorry, looks like you are just giving your opinion, which is fine, but wrong in this case. See bottom where they talk about the benefits of caffeine in swimming!
Here is another good discussion about caffeine and endurance with references that include links to peer reviewed publications.
www.healthline.com/nutrition/caffeine-and-exercise#endurance-performancewww.trainingpeaks.com/blog/caffeine-and-the-endurance-athlete/Caffeine And The Endurance Athlete BY PACIFIC HEALTH LABORATORIES
Caffeine is a naturally occurring chemical compound that functions in the body mainly as a mild nervous system stimulant. It has been shown to enhance performance in sprints, in all-out efforts lasting 4-5 minutes, and in longer performance tests.
Performance And Caffeine
It appears caffeine enhances performance in shorter events through four interrelated neuromuscular effects:
Lowering the threshold for muscle recruitment.
Altering excitation contraction coupling.
Facilitating nerve impulse transmission.
Increasing ion transport within muscles.
In longer events, caffeine delays fatigue by reducing the athlete's perception of effort. It increases the concentration of hormone-like substances in the brain called beta-endorphins during exercise. The endorphins affect mood state, reduce perception of pain, and create a sense of well-being. Caffeine has also been found to delay fatigue during exercise by blocking adenosine receptors on fat cells. As a result, caffeine increases the level of free fatty acids in the bloodstream and thereby increases fat burning during exercise. This latter effect of caffeine used to be considered the major mechanism by which it enhanced endurance performance, but it is now known to be a minor factor. In fact, for those who normally maintain a high-carbohydrate diet it is virtually a non-factor. A number of studies have shown significant performance increases in various endurance disciplines following caffeine ingestion. In one study, elite runners improved their time in a treadmill run to exhaustion by 1.9% with caffeine. Caffeine boosted time to exhaustion in a cycling test by 15 minutes in another study. And in a study involving swimmers, caffeine was found to enhance performance in maximal-effort swims of up to 25 minutes'