Your argument really does not have a leg to stand on.

The concept of "inlining" a function is Programming 101. The mechanism of how to achieve it is what is specific to a language/runtime. You check the syntax/semantics/documentation and figure it out aka problem-solving. Not a big deal and no need to make unwarranted claims/charges against the language as a whole.

>and figure it out aka problem-solving.

The existence the linked thread suggests this very hard and even capable (and very involved) programmers potentially need mentorship for this.

This is not something you can just look up and get a good explanation.

After spending hours trying to figure out why something doesn't work and by chance landing on the above post when searching for inline and C.