Balloon, I fully confess to the sin of omission of the letter "o". I'll sacrifice another rubber chicken as penance.
Let's put it this way, for that AIRPROX to have occurred in C the controller would have had to screw up (an unlikely event) as well as the rest of the events occurring. i.e. it can't be anything else than a considerably less likely event, probably by a couple of orders of magnitude.
E relies on pilots listening, hearing and then interpreting correctly. If any of these fail then all you're left with is unalerted see and avoid, something that is acknowledged as being a very poor means of avoiding collisions. Is that objective enough for you?