This is an assumption you make, the second-hand eBay seller could just as easily turn around and use the profits on the second-hand market again.

I say this from my own personal experience though. I understand many just want a discount on the iPhone 256, but the assumption alone that buying second-hand actually encourages others to buy new is a bit too silly for me.

Much like your first point,

I don’t like how on Lemmy nothing is good enough

Some of us really need to step back and breathe in.