Johnny B- The positive attributes to Alternate shot are found deep within our make-up. My ability to screw-up my own ball is understandable even forgiveable (by myself). But now, when I screw-up someone elses ball, I feel positively worse. The same is therfore on the other side of the coin and the winner is likely the team that worked best, together.
Fundamentally, it might be also understood along the courtesy lines. One should have the desire, NOT to have a negative impact on someone elses round, through their own action. This is major aspect of golf, that Americans clearly are not, and have not, been exposed to, until later in their education, if ever.
The AS format just highlights, or accentuates within the sport, these important canons.