Seriously in most MP games of the Blazing turn timer variety, it is usually one of the two or three best players who win each game. Further, not everyone plays for sheep stations. The game can still be fun when you lose (In other words, if one can't stand to lose, SP is more one's style). Purely identical starts are more likely to be boring. If you're going to go for sameyness, you might as well have everyone play as the same leader and civ as well.
The biggest problem with MP (in gamespy) is the noobs who choose Rome in every game. That and the dropping like flies whenever people get the first excuse while they're not winning. No joke, a guy once said his dog had run away and up and left the game (It was just a coincidence it was on the turn he was about to get brutally attacked )
/rant.
I find this pretty far off base. What about so many other RTS games that fit into the example crusher has given? If piece of mind has his way football players would be playing with different size, shape, and weighted balls. Cyclist would have be running different road course and the guy who had more up hills would be screwed. Baseball players would find themselves using metal bats, some wood bats, baseballs, maybe even some softballs. I dont see any problem with wanting both sides to have the same equipment and same course to play on. Definitely the fair and smart way to go.