If there is any opinion about Lancet, regarding to the Wakefield story that you should get - is that you should hold Lancet in a higher regard, not lower - they retracted the study!
The study was published with fraudulent data which Lancet could not check immediately. In such a an environment a good scientific journal should publish the study regardless of how outrageous the title sounds. There are scientific truths that come out all the time that first sound outlandish. If the journals would only publish the studies which support the status quo in their area, we would never have any real vertical progress only small horizointal improvements.
Then, when it was actually shown by a due process that the Wakefield study was fraudulent - the Lancet, again, as any respectable scientific journal should, retracted the study and published the retraction. This is exactly how the scientific process should work.
So in other words, don't dicourage some study just because you don't like the outcome. Keep checking it further using the scientific method and due process, review, replication etc. If actually shows to be false, random or fraudulent - then retract it.
You should be happy there are journals like Lancet, not be more suspicious of it. That's how science works best.