I don't have time in my life to tackle every single challenge presented to me, and there are over 355,000 achievements on Retro Achievements, not to mention thousands of speedrun leaderboards and other things. I have to pick and choose (or just play the game and get whatever I get). That particular achievement sounds like it would likely take a lot of time and be quite frustrating to pull off.
That being said, I'm not asking for it to be removed or anything. It's just not something I'm ever going to try to complete myself (maybe I'll manage it on accident). Clearly 4.5% of the people who have played the game with Retro Achievements have managed to pull it off.