Yes, karen, people are much more able to buy into that, but it is basically "hiding"... "where are WE going to have dinner tonight? where shall WE go on our vacation? We need to do some yard work this weekend"... to have someone saying that kind of stuff to you can feel very icky. It's not a request or a statement exactly-- what in the heck is it? It's a statement lobbed anonymously from the sidelines into the field of play.
I don't think it's so much that OTHERS buy into it more readily, it's that the person making the statement feels safer, like s/he won't be rejected outright. But you also aren't likely to get what you want if you don't state your wants clearly.