I know this is a bit off topic, but have you ever thought about why steroids and other forms of doping are not a free lunch? Why can't we just inject an external chemical to boost our strength for free without any side effects?

If steroids worked, everyone would be constantly injecting them. It would be like drinking coffee.

And that is the reason why steroid injections are harmful. If there is a free lunch, the human body will simply produce the optimal amount of steroids on its own until the Pareto frontier is reached and a tradeoff needs to be made.

Where does the body get the materials to form the steroids? From your diet. So the primary intervention is always a healthy diet and an active lifestyle. You know, the boring things that parents drill into their children.

It's valid but "medicine" that has only upsides and no downsides isn't medicine, it's diet.