Why are main runnable Python scripts not compiled to pyc files like modules?

Question

I understand that when you import a module, that file is compiled into a .pyc file to make it faster? Why is the main file also not compiled to a .pyc

Answer 1

Compiling the main script would be annoying for scripts in e.g. /usr/bin. The .pyc file is generated in the same directory, thus polluting the public location.