I think you have a misunderstanding of what drm is. It can be handled in many different ways and online check ins are only one of them. Digital games inherently have their own drm because you can't share them.
The problem with the bolded is that consumers expect those big budget experiences but they aren't willing to pay more. Prices have gone up for EVERYTHING over the last 12-15 years yet game prices have stayed the same. In your idea of lowering costs, then we'd be stuck with games that would have less resources and work put into them than games had 12-15 years ago. It's easy to sit on the Internet and say "they should lower costs" but none of us really want to be playing a bunch of low budget titles.
I think it's you that has the misunderstanding. See gog.com or humble bundle for games that are digital but can be shared since they have no DRM.
The truth is there isn't enough room for all the big budget games in the ecosystem. People aren't willing to spend that money right now and the AAA pubs are refusing to accept that and instead are trying to brute force their wishes to reality. Combatting used games is going to do nothing. People trade in used games to buy the new games in the first place! Removing used games will just make consumers MORE risk averse and not less.
You say people wont buy lower budget games but how do you explain App Store darlings and minecraft?
. Most of the best gaming I experienced were developed under a 7 figure budget 



