But usually you do.

Like obviously there are edge cases, but for the most part consequences aren't a surprise. Eat too much, you get fat. Fail to work out, your body goes to hell. Fail to sleep and your mind goes.

Those are such hyperbolic statements. You're more likely to die of heart disease (at least in the US) from the standard diet and activity levels. Just get off the couch and move. Find something fun to do. It's not hard.

> Eat healthy and you become obsessed with it and get a eating disorder.

Except that's the exception, not the rule - the vast majority of people who eat healthy are not disordered eaters.

> Work out, get injured, need pain killers, get addicted.

Again, this is the exception, not the rule. The majority of people exercise without sustaining an injury.

But you don't know if you are the exception or the rule.

And often it's not as simple as counting calories.

Do you work too hard or not hard enough? Should you learn something or let it be?

Chances are, you are not the exception, and neither am I.

Also, it's not easy, but is as simple as counting calories. Conservation of mass and all that.