If it's logical that these people are selling a product FIRST and FOREMOST, why is it logical to believe that they have the best intentions or good intention, or are honest?

There are plenty of studies done on autism and vaccines, it doesn't take much to realize that, the point isn't that the industry doesn't found studies into the safety of their products, but that the industry doesn't magically gain credibility or trust because they have paid scientists to create a product, after their long history of fraud and criminal acts.