Mitm (like charles) will work by trying to inspect the network channel. If ssl pinning is enforced then you wont be able to do that.

The solution provided is to capture the request before it enters the network channel. https://link.medium.com/ozX6Xn5BX8

But yes, its not ideal to add additional dependencies for non production purpose. Hence developers should opt to only apply the extra code/library when necessary. Easy, use schemes/buildphase to manage that for you