From a Machiavellian standpoint (read: Thiel or Zuckerberg), this isn't an intelligent long-term strategy, unless your view of how dumb and malleable people are is such that by playing your cards right, so few people would catch on that it would not hurt the bottom line.
EDIT: could you explain why you want to delete this post?
People already know about the filter bubble, but they don't actually care. Most people aren't going to Facebook for an unbiased stream of news and they don't like to feel uncomfortable (i.e. be barraged by things that challenge their core beliefs).
Willpower and motivation fascinate me. I've been living with depression for a while, but I've been able to conceptually reorient myself to embrace my circumstances and find willpower to do the 'I don't want to, but I should' things whenever they come around. But just as I don't think everyone is capable of advanced systems programming, for example, I'm not certain that everyone is capable of strong willpower.
You make a good point: regulation is a clumsy tool, and I don't think it needs to be applied here. However, I'm disappointed in what seem to be the fundamental motivations of Facebook and its board. I'm not sure that anything could come in the way of Mark Zuckerberg's pursuit of maximizing the world's dependence on his product.