To you, maybe. You'd be surprised at the number of people out there who enjoy playing fighters vs. the CPU to earn things (weapons, hidden characters, endings, costumes, whatever), rather than being little wannabe Ryu's who 'live for the fight' and only play against the computer to practice before beating down their friends.
Sorry if that sounds contentious, but I'm sick of people suggesting that features should be cut from particular genres of games (especially fighters) because 'nobody (meaning that person and his friends) cares about them' or 'they're a waste of time'. DOA (PS), along with Soul Calibur (DC), set the bar for unlockable content in fighting games extremely high, and there's nothing wrong with liking that sort of content, or in expecting similar things from the games that followed. If you don't care about it, that's great--go play a few more rounds against your friends and stop telling people what they should and shouldn't want from their fighting games.