Digital download games go on sale on console quite regularly these days, there's a big January Sale going on on the PS4 & PS5 PlayStation Store at the same time you posted this. Maybe sales were less frequent on the PS3 PlayStation Store, but things have changed since then. Physical games on console are also still very much around, so unless you bought a PS5 Digital Edition or Xbox Series S you do have more than one place to buy games from on console.