Because they are not unbiased and impartial as they should be, and because their news is often contradictory....today water is good for you, tomorrow, it's bad. Today mobile phones affect the brain, tomorrow they don't. Very confusing.They can't seem to make up their minds and I think that is the main problem. You have to take everything with a pinch of salt.Can I trust them completely? No.
Thanks for your comment it is much appreciated.