I can understand that. But just as a side note, most of those mod packs are built and maintained to be pretty stable without any internal conflicts or issues. They're also pretty good for creative building since they add in so many new materials, biomes, and aesthetic things, while also allow the creation of decorations like half and quarter blocks or panels and covers.
Sure they do change the nature of the game a bit, but it's still pretty much the same at the core, just with far more new features.