Don't know about you folks, but since there's not a lot to look at in the cockpit of a Pitts, looking outward is the only place to look, for me. You don't need to look at the controls in order to tell where they are - that's what feel - eg, the angle of your wrist with your hand resting on your knee - should tell you. If you know where the column/yoke is at the point of stalling, you can tell how far you are away from that.
Having an aircraft that cannot stall - thanks to a piece of wire across the back of the stick - would be unfortunate - it would make landings very much harder, because that's when you want to stall. In an aerobatic aircraft, also, there are times when you want to stall the wing - such as in the entry to a flick roll, or spin. I can tell you that the stick position is the same for a spin entry, horizontal flick roll or a flick on a 45 degree upline.
Phil Unicomb - in the article I linked to - explains this much better than me - but the concept does work. I know, I've tried it. All I can suggest is that you, who don't believe me or Phil Unicomb's article, get into an aircraft, get in the air, and try it for youself. Preferably with an aircraft certified for spinning; preferably not an Airbus 320 full of passengers.
Here's the link again to that stalling article:
http://www.casa.gov.au/fsa/2000/sep/FSA34-35.pdf