Really, I'm genuinely curious, short of just wanting your own way, what is your justification for wanting to be able to enter CTA without doing the smallest bit of preparation and a bit of courtesy to the guys in the tower?
Once again Junior you are using your own skills as a benchmark for judging others. Try a stint as a flight instructor and you will realise that quite a few lack your capability. In any event, a filed flight plan is not a requirement for VFR and I can't find courtesy to ASA staff mentioned in the AIP. In any event, the guys I have questioned in the local tower are ambivalent about filed flight plans from VFR pilots.