I haven't followed this thread that close, but was thinking the conversation was more directed to behind the arc and immediately in front of the arc and the reasoning was that being the close together and all things equal you got 50% behind the arc and that 50% is much greater than the percent decrease in a few inches.
I also understand what you are saying and agree that MANY good shots take place in the inbetween game..which was the staple for any good ball player years ago and what separates many today. Practice years ago might have included pairing up with a basketball and moving around the perimeter 16-17 feet away and catching and then shooting. When the rebounder caught the ball you would start your movement and do the same for a minute WITH intensity. Rotate positions for the other player for a minute. rotate again and now shot fake and one dribble to right or left and shoot (looking to move 5-6 ft with single dribble)...rebounder gets ball and start movement again...catch, shot fake, one hard dribble (what starts your shot and gets you going) and shoots ball and repeats this and rotates to next player. Then you might move into same mode but allow 2 dribbles after shot fake (moving 10 ft or so). Intensity in moving, planting feet, good 1-2 stop, square and follow through. All players needed to be able to shoot off the dribble, but this art has been lost due to the three....AND for some cases it does NOT make mathematical sense to do this if a 3 is available. However, I miss the beauty and purity of basketball in everything that went on away from the low post and out to 18 feet or so.
5's were expected to be able to catch a pass at the elbow, shot fake (course they had to be able to shoot to fake it
) and take ONE dribble and shoot a layup (15 feet coverage with one dribble). Personally, I can do without the 3 ball or would happily move it back, but the real killer of basketball variety IMO is the shot clock...particularly where it is today...maybe not so much when it was 45 seconds...but that is a whole another topic and I know some love it...it just takes away much of the game and makes it too one dimensional and I know it is here to stay due to fan support.