So you basically tell me.
I can simply use Dnspy and modified the code without using assest Gripper?
dnspy is required if you want to do any modification of the code itself, but there's another reason why I told you to use assetripper as well; technically using only dnspy to get the code could work, though I mainly told you to use assetripper with it as well since it gives you a version of the code that is more legible compared to dnspy's version of the code that it gives you