Vixen
Penultimate Amazing
The JAIC investigators knew full well how and why the Estonia sank. They knew the cause with total certainty. Their certainty was based upon a proper understanding of all of the available evidence, together with their collective expertise, experience and intellect.
They didn't do what you're doing - which is to jump to a conclusion and then look for "evidence" to support your conclusion. Instead, they collected all the relevant evidence and testimony first, and then used that evidence/testimony to arrive at a conclusion.
All the things you've listed in your second paragraph above are nothing more than a mixture of falsehoods, misunderstandings and ignorance.
You just made that up off the top of your head. I bet you cannot even name four of the JAIC members. Yet here you are claiming to have done a probity check.