Do you realize how judgmental you're being all the while claiming that you're "growing as a person"?

This seems naive at best.

Obesity carries with it increased health risks leading to overall higher medical costs for everyone.

Second, "I do not agree with what you have to say, but I'll defend to the death your right to say it." is a concern stone of Western Civilization, iirc.

I doubt it's people who just like to hate. It's the visceral response to the SJW shitshow that reddit is quickly and obviously becoming.

In order to let women know you find them attractive, you have to risk getting rejected.

Similarly, in order to let people know you, you have to risk getting rejected.

Although,, no complaints because life ended up well.

Because the other choice is to simply not do it. You're going to eventually be an adult where you are in charge of life. You have the ability to choose to not do things then just as you have the ability to choose to not do things now. The only difference will be that the severity of those consequences changes. Being able to focus and complete tasks at hand is a skill that you have to train. Get in the habit of thinking of it as working hard, instead of simply being smart. Work harder and smarter.