If their study is accurate, why it needs to be suspect just because they want people to use their service? If I provided a good service and my competitor provid

If their study is accurate, why it needs to be suspect just because they want people to use their service? If I provided a good service and my competitor provided a bad one, and I said "this guy does bad stuff, use my stuff instead" and you knew it's true - would you still use bad service just because I'd profit from you using the good one? That makes no sense.