just for the sake of clarification

clarify.txt

What I mean is that even though JS method invocation seems to work like this:

  (obj.method)(args)

it's a bit trickier than that. See this:
  
  > a = {}
  > a.toString()
  "[object Object]"
  > (a.toString)()
  "[object Object]"
  > z = a.toString
  > z()
  "[object global]"

That is: there's a difference between invoking obj.meth versus just retrieving the obj.meth property and invoking it using ().

In either case, there's nothing keeping CoffeeScript from parsing

  obj.meth

as
  
  obj.meth()

except for the desire to maintain certain levels of parity with JavaScript's syntax. (It'd always be possible to obtain the implementation of obj.meth with obj['meth'], FWIW.)