I would imagine this is a subjective preference, however the ability to customise commandline arguments would be useful as it is much more general and configurable. Might be useful for use cases such as the above, or setting a default file type, or pasting text from the clipboard, or probably others

+1

I don't have a command in my vimrc for starting in insert mode, because I don't usually want this. But in this case, where I intentionally open an empty buffer to write something, it would be nice to just start typing instead of entering insert mode (even though it is just one single press).