Comment by aeturnum

Like I said I am no low-level C guy, but my impression is that the existing structure is allowing you to break up the setup however you like across functions / calls / etc (just keep the context) instead of keeping many different contexts. The approach you roughed out is fine as long as you can 100% swap any arg for any other when you make the call - but I think often that's not true? Or if it is you need to pass all the info. So I suspect you are drilling down on a simple case that elides the problems that will arise in the complex case.

You can, ofc, write your Lua wrapper like your example - all in one place. It reduces the risk of misuse. But you could also do it differently - which is the flexibility that I think is a strength.