Why “$().ready(handler)” is not recommended?

Question

From the jQuery API docs site for ready

All three of the following syntaxes are equivalent:

• $(document).ready(handle

Answer 1

I think this is really more for readability than anything else.

This one isn't as expressive

$().ready(handler);

as

$(document).ready(handler)

Perhaps they are trying to promote some form of idiomatic jQuery.