Being a NEET is looked down upon in most cultures. Even most children are in education of some kind. To be a NEET you have to live off of someone else's lifestyle, so it's deemed a bit parasitic. Obviously if someone is disabled or something, people don't normally have this type of association with the person, but y'know. In most cases.
In incel culture, it's deemed normal, because a good chunk of the people are probably NEETs.
Not being a NEET is normally a good sign. It means you're doing something with your life and have plans for the future. It also probably means you have actual income to spend on looksmaxxing/etc.