I never played minecraft, but from what I heard it's quite addictive, and its success is often attributed to the fact that you can do anything you want.
That right there is an opinion. If you think it's a bad game, but you don't know why, you should figure it out before you ask people about your own opinion.
Why do people like minecraft.
Again, it's all a matter of opinion. Some people like that kind of game, others don't.
So far, there has never been a game in which nobody liked or disliked. Every game has had its fans and its haters (and everyone in between).
Obviously because they think it is a good game. either you are questioning a particular individual and subjective taste in games, or you think everyone shares your opinion. Whatever it is, you will get a lot of people defending it when they see this thread, more so, you missed the video game section and the thread about this game there. Personally I believe you should not play it if you don't like it, and leave it that.