It's not helpful neither fair to attach systemic issues of capitalism to the novel technology you personally don't like.
Yes this is a valid concern. Yet it's about the same as jumping on a random person in the grocery store with a lecture about the unsustainability of the product that person is taking off the shelf.
Sadly, buying second-hand devices for personal use won't affect these issues of the economic system we live in.
I am making no statements about anyone's morals.