Well, WAY back in the day, we did it all the time. in that awkward period between the crash of '84 and when I got my first NES, the only place I knew you could get games from was other people; I didn't realize they came from stores. I had no gaming mags, and there weren't even screenshots a lot of the time. Therefore, everything was a blind buy.
Later, we got a NES, and even later, a SNES. Video stores rented games for these. It eventually became a weekly habit, so we knew what games we liked, and what to save our pennies for (and our parents knew what to get us for gifts.)
then I became a pc gamer for a bit, and that rarely required blind buys (*cough*piracy*cough*).
After that, I started getting into old videogames, and I was blind buying again for the first time. But at least now, if something turns out to be a turd, i haven't lost much. For current console purchases, I nearly always do internets research before buying.