This is somewhat silly. First, it is perfectly straight forward how to do the signature stuff, such that if you really want to, you can. However, this is akin

This is somewhat silly. First, it is perfectly straight forward how to do the signature stuff, such that if you really want to, you can. However, this is akin to asking why it is so hard to write a binary against stdlibs on the machine. It is hard because that isn't really an easy ask. And the solutions we made to make the problem tractable are all nicely encapsulated in the SDK tools that we use. Why skip out on them?