Someone obviously got their proc and wants to try and keep it away from others.
In a game where RNG determines most everything, the sense of achievement that you speak of is not equivalent across the board for everyone. In 2009/2010 the drop rate was very different as I had to farm 1100 bloods (1000 for my husband’s 9 fails and only 100 for mine since I proced the first time). So using your math with old drop rates .. 1100 bloods would be at least 1400 hours .. or 2hrs a day for 2 years.
2 yrs for a pair of pants .. No thank you.
That isn’t an achievement that is a stupid waste of time and not a fun way to play a game.