Party comp ?

Hi redditors, What is the point of changing team comps in dd2? In dd1 you were forced kinda, to remove quirks, to remove stress, to heal diseases, due to deaths, to make use of good trinkets you found, and so on. Here you can choose, why would i choose different parties. Just cause I want to? Dd2 exists because we loved dd1, because it was challenging, because it was strategic in multiple aspects. Why in dd2 i have to use resources to unlock characters that im not 'strategically forced' to play? Ty