shouldn't --completion for zsh also complete paths?

Hi,

I was struggling to make `-- --completion` work with both my arguments and paths. For example I have a "--path" argument and I would like to autocomplete files paths instead of treating it as a flag.

The workaround I found was to do `sed 's/compgen -W/compgen -f -W/g'`

Is there something I'm missing or should I make a PR to add this '-f' by default?