You learn a few things when you spend a career in the Navy, when you live for years in VERY close proximity to a few hundred of your closest shipmates. You learn that if you play loud music, you're keeping others from sleeping, and people get pissed off. You learn that if you don't take showers, you begin to stink, and people get pissed off. You learn that if you don't clean up your own rack, it looks like crap and reflects on everyone around you...and people get pissed off.
In a nutshell, you learn that even though you're an adult who is fully capable of making his own decisions, for the sake of keeping the peace, you have to take into consideration those who live around you.
And that's what much (though not all e.g. lying journalists etc.) of your paraphrased quote misses - you want to have all the freedoms of adulthood, but your freedom ENDS where the other person's freedom BEGINS. You can be as free as you want, as long as your freedom does not detract from the freedoms and opportunities of others.
Now you can ignore all this if you can find somewhere in the world where you can truly live not just as a sovereign citizen, but alone, without anyone else around you...but if you're going to live around other people, if you want to live a peaceful life, then you must remember that your freedom ends where the other people's freedom begins.