Yes. There is a good saying "It is difficult to get a man to understand something, when his salary depends upon him not understanding it.".
The continued success of GM research and their commercial interests depend heavily on positive opinions and outcomes. It should be simple to see that this can lead to suppression of negative issues.
You can also realize from this that something else can happen; over-promotion of positive outcomes and projections.
Once you start to analyze the GM landscape with these ideas in mind, you start to understand and see that the discourse is currently heavily biased towards promoting only one side of the coin.