True, and in fact, this is how nginx works: the process that owns the event loop is separate from the process(es) that does the work.
This is a decent way of mixing an event loop and multi-core processing, but with Node, you're forced to marry the HTTP server to the application, which is a dangerously tight coupling of responsibilities.
If you really want to do something silly like write your application in server-side JS because you're familiar with it, then it should be through some interface like WSGI in Python (or even CGI in days of yore), which properly separates HTTP connection handling from application serving.
