Understanding the fitness landscape.
The fitness world has a few core issues:
All the best fitness influencers' bodies are a result of genetics and/or steroids, NOT their superior knowledge of diet or exercise.
Put simply, they could've done anything and they would look better than 99% of people.
The fitness space also largely follows the lead of professionals, touted as the role models for the sport, but these professional athletes or body builders are no way near peak health.
All the best are compromising health for performance, but when we're looking for health and using sport to get there, looking at the professionals won't help.
Bodybuilders, runners, triathletes, or cyclists. None of these have happy endings after long careers and they have anything from joint to heart issues.
Beyond that, even scientific studies are not fool-proof:
Even when they're well executed, without conflicting business interests and making an honest attempt to research a specific question; they can be wrong simply because if we ask the wrong question, we can't get the right answer.
If we were to ask the question "What is the most efficient way humans can move self-powered? Swimming or running?" we would never get the right answer: cycling.