isn’t this the same with steam? can i buy a game on steam and copy and use it on another pc i own without downloading it from steam again?
No you can't. When you pay for a Steam game, you rent not buy it.
True.
https://store.steampowered.com/subscriber_agreement/ "The Content and Services are licensed, not sold. Your license confers no title or ownership in the Content and Services."
> The wast majority of games can be backed up locally and reinstalled indefinitely without online access
That doesn't mean you bought/own them.
No you can't. When you pay for a Steam game, you rent not buy it.