Capitalism is driven by the idea of a free market, where competition and the law of supply and demand determine prices, production, and distribution. Manipulating you to buy stuff you don't need is the result of human greed, not capitalism. That's such a monothink way of seeing the world.

Imagine living in a small town in the middle ages. You're growing corn, your neighbour has a chicken farm, then there's also a bakery, blacksmith etc. Say you now need nails. Where do you go? To the blacksmith obviously. Does he just give them to you? No, he wants something in return. Well you offer corn because that's what you have plenty of but what if he doesn't want corn but wants eggs instead? Well you can go to your neighbour and ask if he would like to trade some eggs for corn which you could then further trade for nails. Maybe that works, maybe it doesn't, but that's still a bit of an hassle. That's why people came up with money. You can just sell your corn, get cash, buy those nails with said cash and the blacksmith can then go buy eggs with that. That's capitalism.