There are always two sides to every story.
Please don't mistake me for a Braun sympathizer. However his reasoning behind the connection to Anthony Bosch sounds somewhat convincing. From The New York Times:
"There was a dispute over compensation for Bosch’s work, which is why my lawyer and I are listed under ‘moneys owed’ and not on any other list,” Braun said. “I have nothing to hide and have never had any other relationship with Bosch. I will fully cooperate with any inquiry into this matter."
Supposedly they spoke to Bosch about possible urine tampering and elevated testosterone levels. This could mean that Braun's lawyers were simply busy trying to build a defense. To an individual trying to look at this from an unbiased perspective, I can see where this might be legitimate.
Our questions will certainly be answered soon enough. MLB will have to respond to this with an investigation of their own (if they haven't already). Until then, we cannot know for sure whether or not the interactions were legitimate.
Everything is speculation at this point.