Ugggh, credit card rewards. We all pay higher prices on goods because of the fees credit cards charge merchants, and then can get "rewarded" some of that money back. No thanks.
You either play that game or subside others who do, regardless of of whether you like it or not — you are still participating. Prices are already higher for everyone.
We should have some form of Faster Payments scheme, backed by the state, because cheap, reliable transaction networks are the sort of infrastructure that's good for business. At the very least, this screams "make FedNow the default payment rail". Then if people actually want to spend money that isn't theirs, let lenders build something pluggable on top, so their costs and needs are solely limited to the credit aspects, rather than skimming of of every single transfer of value.
I also dislike the concept, but whether you personally participate or not doesn't change anything about the underlying game theory causing the emergent phenomenon.
If you really dislike it, maximize your points and fund a campaign to lower credit card interchange from them :)