All of that is true and in addition; DTs RNG and it’s odds are not easely understood.
If I want to get a specific rare item in MH, I know that there are three odds of 1, 2 or 5%, depending on difficulty rank. Any gachas odds are fairly easy to understand as well.
Good luck calculating the actual odds for getting an item you want in DT. It’s damn near impossible.
In contrast to other games, DTs odds are not disclosed and that’s never a good sign.