The genre would not be the issue, but every single Isekai seems to get more and more lazy.
FFS, they don't even pretend to care about story or world or characterbuilding, it's just "look at this strange gameificated world, where everything is full of numbers and skills and levels, and MC gets this broken cheat ability!"
Take the script of ep1 from 10 of these animes next to each other, maybe redract the character names, and you will have a hard assigning them correctly because they are all the same.
Planning is the process of replacing chance with error.