I blog for the following reasons:
1) To let my family and close buddies know that I'm still alive somewhere on this planet and am still capable of doing things (i.e. I'm not paralyzed, in prison or sold to some slave traders)
2) To express myself in a relatively healthy fashion (seems like a better option than smashing something - oh yes, I do lose my temper ever now and then). Of course, it's a good outlet to share good feelings and goodnessknowwhatotheremotions
3) To practice writing - Silly as it sounds, it forces me to write, an activity I don't really like to do. I dislike writing the traditional way even more, so typing seems like a good compromise
So, no, blogs are not pointless to me. It's relatively better than surfing the Net for porn or some worse Internet activity.
Anyway, all in all, I doubt anyone is obligated to entertain the rest of the world with their blogs. Neither am I obligated to visit/comment anyone's blogs. Ppl can have their own standards of "good blogging" as long as they don't try to enforce them on the rest of the world with some silly arrogant attitude. There are more pressing issues in life than boring/mediocre blogs. Heh.
Happy Blogging.