They always have to have some ludicrously stupid and technical achievements in to just waste time for the 10 year old children with only one game to their name.
If your achievements have a less than 1% completion rate because of RNG, pointless grinding, or impossible feats, then it's not an achievement. It's Masochism.
Also those achievements aren't that hard. You have items to bend luck to your side in casino games. The tough opponent actually gives you BIG money, to the tune of trillions yens, and can be cheesed. And the old games are also very easy, I beat them on my phone from my bed using Steam Play.
I agree, but also I don't mind it. Personally, I don't care about achievements really. I like them as a tracker of progress and what I did, but I don't care about the percentage. Having really hard ones is great for people who do care. It let's them get extra value from the games chasing that elusive goal.
It can be fun to look at the completion rate for achievements like "finished the tutorial", "beat the first boss" and "reach the good ending". In some games it's surprisingly low.