No, wait, it literally WAS Steam. I mean, it wasn't just Steam, but those guys were there at ground level. Valve is ultimately an offshoot of Microsoft, it's not like becoming the main app store on home PCs by introducing structured DRM, sales and download management software wasn't part of their plan.
So let's be clear about what we're talking about here. Denuvo? Yep, that sort of DRM predates Steam. License limits and online activation? That's contemporary to Steam and it's the problem Steam is trying to solve. Online app stores built around DRM? Steam is as early on that race as it gets, and it's absolutely built for that purpose.
I like it as a piece of software, too, it's well made, but why whitewash it?
Plus, I have to point out that you seem to be arguing two opposite things at once. Is DRM inevitable? Well, since you seem to be correctly arguing that DRM-free alternatives do exist and seem to be financially viable... I'm gonna say no?