You’re right that it’s not a complete solution. Offhand, it seems like this won’t help graphic designers that make advertising graphics if the advertiser doesn’t really care about copyright protection - or basically anything that is expected to have a short lifespan (who cares if an ad campaign that runs for a week is copyrighted?).

Are those jobs worth fighting over? There are probably a lot more graphic artists making a living producing bilboards and web ads &etc than there are making a living selling their own art, but are those jobs something that society at large should make an effort to protect?