Everyone saw the current landscape coming, and there was no way around it if we wanted online distribution. I hate DRM as much as the next guy, and love my physical collection, but it wasn't Valve and Steam that ushered in this BS. You can avoid steam, and a large amount of DRM if you genuinely care about. There was pushback years later and even Apple allowed you to DRM-less options.
After years of MPAA and RIAA BS piracy claims from cd & dvd ripping and declining physical sales, every company and their mom was looking into DRM to allay the fears of copyright holders and enable digital distribution. It was going to happen regardless of Steam. Apple, Microsoft, Sony, Philips, etc were all launching the same shit. Apple launched the iTunes store months before with complete DRM and people ate that up. Companies new years before people would adopt it if the benefits of digital distribution outweighed the inconvenience, and they were right.
Shit like Denuvo was going to happen regardless, as despite the push back on some of the invasive DRM, some companies remain unconvinced. They do it even on top of Steam.