It doesn't make much sense because I read people's comments raving about a DD like Steam because they can buy games so cheap on sales. Sometimes I'll read about a AAA release being on sale for $10 within the year of being released. I also look at these Kickstarter projects. Usually $10-15 for pledging for a digital copy. Code Hero had a $1 name your price pledge for a digital copy and then a $42 physical copy pledge. There's a metroidvania game named Core of Innocence that will be a free game that has a pledge for a physical printed CD copy including the soundtrack for $15. Wasteland 2: $15 digital copy, $50 boxed copy.
Take me. I played games on an NES and N64 before I started PC gaming around '98. I loved PC gaming and only bought PC games from that point on. I got burned by Half-Life 2 and then slowed down my purchases after that. I got burned by Gears of War for PC a few years later and I just quit buying PC games. I didn't raise a fuss or rationalize it in any way. I didn't even know exactly what DRM was. I simply quit buying. I quit caring so much that when the PC that I had spent quite a bit of money on so I could play the latest games started having problems, I didn't even bother to try to fix it. I had that PC for playing games. I simply put it in the corner, let it rot, and bought a laptop. I bought a PS3 later.
I only got back into some form of PC gaming because I played some of my old games a few years back and thought, "Gee, I really miss games like these ones. I wish I could play more like them." Which led me to some "Best PC Games Ever" lists, which led to some Google searches and which ultimately led me to GOG. Even then, I hated digital distribution, but they promised DRM-free, so I took a leap and made some purchases anyway. GOG also has the only forum I've ever participated in, hence the user-name I don't care for because I never thought I would post.
The point is, how many people did the same thing as me but never rationalized it or complained on a forum? They just simply left the market. I don't have a lot friends that were as into PC games as I was, but most of them that played video games would buy PC games every now and then. They don't anymore. They strictly play consoles now. One of them still calls Diablo his favorite game of all time to this day even though now he only plays on an Xbox 360. He has no idea what's going on with PC gaming anymore. The same thing for another friend that absolutely loved Doom games.
Let's also not forget people who maintain old computers to play old games, file-sharing, and people who quit buying games altogether. How many of those people could be potential sales? If we want to talk about lost sales, I'd look to DRM's effect on potential PC game sales. I truly believe that DRM is holding PC gaming back. Consolization happens because there are so many console gamers. Could be there is a reason they don't find PC games lucrative anymore, like maybe they want to buy a product or something like that.
Edit: I think those of us that bother voicing our opinion are doing it out of love for PC gaming. We want PC games to be full of character, awesome ideas, and depth like some of the greats were in the past.