1. A treaty is negotiated between the two major markets in the world.
2. We know that when this kind of treaties are passed is almost impossible to go back.
3. We know that the most important input to those treaties come from corporations.
4. The conversations happen in secret.
5. The democratic representatives are not allowed to read the treaty except in a hurry and without legal help.
6. Free trade is already a reality but, somehow, a wider treaty that create new tribunals where corporations can sue states is necessary.
You are right. No need for tinfoil conspiracies.