Have you ever tasted freedom? Have you ever been apart from your family of origin financially and emotionally? Have you ever been able to tell your parents in person, over the phone, in email, or by letter exactly how you feel about them letting your life get to this point and their failures as parents? I'm certain the answer is "no", because you are financially dependent upon them.
I have. I didn't feel strong or victorious. My feeling was more like walking out of an authoritarian environment - the military, a prison, etc. - and noticing the enormity of the world and my smallness within it. Then, I began the incredibly difficult work of searching for my niche and building new core values from scratch separate from the toxic values of my family of origin. That is the price of freedom: Your controllers / abusers are no longer around to dictate your decisions.
You do pay for being a NEET: You swallow all the resentment you rightfully feel toward your family of origin because to alienate them would be to lose their support. To choose to receive their support and to swallow the resentment is a valid choice, but why bother justifying yourself? If your parents' support ended, your NEET lifestyle would end. Also, you are giving up the experience of freedom from your family of origin. Maybe it would be thrilling, maybe horrifying, maybe both. But you fear the big bad world outside - rightly so, based on my experience - so you sit at home still being supported by the parents who caused all your suffering in the first place. Again, a valid choice, but why promote it as desirable?
[Edit: Typos]