Pat,
Is it really about par, or the fact that those middle shots in golf really aren't much fun, compared to the thrilling bomb/long hit of a tee shot (yes, to most that is a bigger thrill than placement) and hitting the green? Why do you think an extra shot or two, that is more boring would be favored by (and more fun for) the many average golfers. Or that more in place of fewer shots with some hazards to negotiate? Just curious. Or lastly, do you think the average golfer wants fun or boring challenge? I think the vote boat has sailed in favor of more fun.
Why doom the majority of players to playing something other than golf intended. Or conversely, why have too short or too long of a course for every class of golfer, save one?
In some ways building extra tees aren't really that expensive. You need a certain amount to spread the wear, and you can build it all together, or for about 10% more tee, you can spread it out over many tees. It would be just as expensive to build bunkers from 200-320 yards in the fairways, no?
Not worried about simpler handicapping, since most of the work is done by computers these days, and they can handle the variations.
As Paul says, if the ball rolls back and the range of tee shot distances narrows a bit, then designers will reconsider.