tl;dr: your money does not go to Google and the ppl you get it from would have purchased it anyway. The device just ends up in your hands instead of the land fill or being recycled

It all depends on how you look at it. You choose to see it as your money saving an object from the landfill, and I choose to follow the trail of my money going all the way to Google’s pocket ultimately.

But those two outlooks are not incompatible: they both hold true. You just choose to disregard the latter while I can’t get past it.

usually used or refurbished devices are from ppl who would have bought it anyway

You don’t think resale value affects purchasing choices at all?