There is a very big difference between the two:
On one hand, you have scientist who share their interpretation of what they can observe. You are free to agree or disagree as they do encourage discussions that challenge their conclusions. They will debate and their views may be wrong, but they will still be willing to debate it and respect your right to your opinion.
On the other hand, you have the Governing Body who's interpretation of the scriptures is, according to them, made brighter under God's Holy spirit. You are not entitled to challenge these conclusions. If you do so, you are a bigot only trying to promote yourself above your brothers and sisters and should be viewed as a threat and treated as such. Should you pursue your desire to question their current teachings, you will be thrown outside of the congregation and effectively put an end to all of your social life (family and friends).
It is not because two things are similar in one aspect that they should be compared. A red plane and a red car, though both being red, are very different thing and do not equate one another.