This article does not say Lua is "better" than Python, it simply describes why we choose Lua. Bundling Python and rebuilding for each platform was certainly an option. However, luvi has the advantage that it has many platform specific builds prebuilt and extending luvi with more CMake files + C libraries is easy.

Plus me (the author of the Lua agent) was already familiar with Lua, so the easiest way to get from A to B was for me to use a known-good tool.