The airsoft guns actually do more for you "reality" wise, than any of the "target" type guns, or even "real" guns simply shot like a target gun on the range for that matter.
You really can practice what needs practiced, and against other people as well, and in real environments and situations.
Bullseye is bullseye, and is really just the basics, which you should already have down anyway. Im not saying there is anything wrong with this type practice, and we all need a tune up now and then, just to confirm, but unless thats all you do, its really not what you should be practicing once you have the basics down.
I think a lot, if not most of the discussions that go on, are based on experience in the "target" realm, as opposed to the "practical" realm.
Im willing to bet that more shooters stand at a bench or table and leisurely shoot at bullseye type targets, basing their skill on the nice little groups they shoot.
As opposed to those who shoot from their holster, worn under their normal street clothes, while trying to get off line as they clear the gun, draw, and shoot, and base their skill on whether or not they get good "hits", even if they arent a small group.
If you have the basics down, its time to move on and expand your horizons. If not, the old duck weed will start to set in and take over.