The "wrong" example is definitely more readable than the "right" one. Yes, I know, it's a bad example, far from what reality brings usually. For more complex cases, though, taking out the boolean would definitely make it much less readable. Twisted definitions of readability seem to be all the rage now. Poor us.

This is just a very silly attempt to rationalise one's irrational disliking of something as simple and fundamental as returning a boolean. Much more harmful than simply hating tabs, for example, but the same psychological mechanism.