My argument isn't that Paypal is more wasteful necessarily, it's more pointing out the inconsistencies in how value vs sustainability is weighed up.
Ethereum is currently doing 30 TPS [0], and Paypal ~200 [1]. Assuming that energy usage scales linearly (a naive assumption, but for arguments sake), it could deliver similar value with 10x lower energy consumption, I don't find arguing against the adoption of PoS crypto solely based on sustainability very credible either.
[1] https://www.ing.uc.cl/en/boletines/engineering-student-scale....