i’m a console gamer from 10+ years, bear my stupid question

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?

> can i buy a game on steam

No you can't. When you pay for a Steam game, you rent not buy it.

Not true. The wast majority of games can be backed up locally and reinstalled indefinitely without online access.