He owns the team, he can answer that question any way he wants. It isn't like he gave anything away, anyone with a brain knows the Dolphins are going to use a draft pick(s) on lineman and most likely it will be for the RT position. He didn't say the Dolphins are using their first round pick on a RT, just said the draft. In a deep lineman draft that could mean a first round pick, a second round pick or even a third round pick. If you have a problem with it, you just need to get over it. If Jimmy Haslam, Shahid Khan or Bob McNair said their team was going to get a quarterback in this upcoming draft, no one would have an issue with that statement. What makes Ross any different other than the fact that you don't like him?
You want a owner to complain about, how about Woody Johnson of the Jets. He clearly broke NFL tampering rules by discussing publicly today about having interest in DeSean Jackson.
You don't need to criticize Ross every time he opens his mouth.