The point about 'normcore' is not that it is what 'normal' people wear, but that it is an active aesthetic choice to wear clothes that are anti-fashion. You are not normcore if you are already, er, normal. Normal clothing is normal, that's all. 'Normcore' fashion was an attempt to subvert the fashion industry but has now become hipster mainstream (an oxymoron, but I think you know what I mean). Now that people are (mis)using the term in a wider context, it has lost it's original meaning.