This achievement is way over tuned. 

I'm at 45/50 for overall achievement progress, I've even completed Grab em All without specifically grinding it, and I'm less then 1/3 of the way to completing Unnaturally Curious (currently at 3270/10000).

2 of the remaining achievements are bugged and can't be completed because Fassie's quests are broken (Endless Biographer and For Those Who Wish to See What Cannot be Seen), but if they ever get fixed that's only like 3 additional runs to complete tops. The other 2 I'm missing are drink achievements. There is basically no content left to consume in this game but progress for this obnoxiously extra grindy achievement hasn't even hit the 33% mark. This achievement is very poorly designed with a quota way too high for the amount of content that actually exists in the game. If it was halved to 5000 it would still be super grindy and greatly exceed the game's content; but 10000? this is just obnoxious.