But as the internet grew, it became very easy to copy them and share the copies.
A lack of copyright laws would allow for a greater level of piracy (loss) but it would also allow for developers to remake technologically outdated or abandoned games (gain). You're focusing only on the losses while ignoring (or are simply unaware of) the gains. The real question is, which outweighs which? Would it be a net gain or a net loss? If you don't know then it's irresponsible to advocate such laws.
Devs are already doing that oO. You aren't very familiar with copyright laws aren't you?