Why do muslims act like they invented everything?

When I see western couples on social media talk about how the women is a stay at home mom and the man is the one working and paying 100% of everything , I see muslims women saying that islam invented this “his money is my money and my money is my money” nonsense. I know that in pre Islamic Arabia, women did work. But islam didn’t “Invent” traditional household , why do they say they invent anything that is in their religion ? Ive even seen them try to act like hijab/ caring for your parents/ protecting your female relatives and other things were invented by islam. Is this to be deceitful or are they really that stupid?