The point is at that all merchant end up adding the 3% in their margin so what you buy is more expensive. You just lose if you don’t use points but, you aren’t actually gaining anything.

You're contradicting yourself. Since everyone is paying that extra 3%, by not getting the rewards / points you're at a disadvantage.

No, it's you who, by supporting their toxic industry, are making things worse for everyone. c.f. Tragedy of the Commons. What you're advocating is a slave mentality.

The people paying ~20% interest are slaves. For some, they have no choice and I sympathize with those.

I pay off my bill every month. I pay no interest, no fees, and get free stuff for it. You should do the same.

It's not free. They take the enormous margin they get off the sellers and kick you back a few peanuts. Essentially, the sellers pay a tax, and you get a small distribution of the tax, and as a result all products are more expensive.

Points are useless.

The products are going to be more expensive for everyone. Would you rather have a card that offers 2% rewards points or one that doesn't offer any? You are obviously better getting the points.

I understand how it works. I'm taking a bigger picture view and saying that if nobody had points, everything would be cheaper than if you had gotten the points in the first place.

Obviously in the current climate, a card that offers points is going to be more competitive than a card that doesn't, but that doesn't mean that points aren't a mind-bogglingly stupid proposition to begin with.

Yet those sellers don't offer their own discount or cashback for not using credit cards.

Yes they do. Gas stations have a Cash Price for not using a credit card. The ones who don't are just pocketing the difference because so many people don't think about what they're paying for.

I don't need yet another minigame to manage in my life, thanks but no.

There's nothing to manage.