Both things can be true. I think there is something to the remark that people aren’t wired to save. I don’t feel like I can afford to buy frivolous things at every store I go into and I make decent money. On the other hand, I know someone making FAR less than me who literally does buy junk every chance they get.
I do feel like I am the outlier, I’ve been saving money since I was a child and everyone else around me tended to blow any lump sum of money as soon as they got it. Whereas I would spend 0-10% and put the rest in savings.