OH, that's a loaded statement if I ever saw one...and also why I prefer point buy.
Loaded? How so?
1) In die rolling, each player has equal opportunity to land in the same region of the bell curve (assuming its a uniform die-rolling system- see below).
2) In point buy, everyone has exactly the same resources to build his character, but an experienced player can almost always out-allocate his resources than a less experienced player.
Each is statistically fair.
But the meaning of my comment is this: I don't care what method is used as long as all of the players (and optimally, the NPCs) are using the same method of stat gen.
I've been in campaigns where the GM said that any legal stat-gen method was permissible. That got messy when some people realized they were using methods that yielded differing amounts- it almost derailed the campaign.
I'm also not a fan of systems like the one that first appeared in the original Unearthed Arcana, in which you chose your class first, which then determined how many die you rolled for each stat. The classes were definitely not balanced on that level.