I too loved Landry coming out, and I also think he could have a big impact on the defense as long as he's out there. He has a rare combination of size and speed you don't usually see at the safety position.
That being said, this is just another example of the Jets needing to call attention to themselves needlessly. Think about it. All he's said is the obvious. Do you really think that last season no one tried to get physical with the Patriots TE's. Do you really think that the rest of league collectively decided to let them run free in the secondary. That the Jets are going to be the only team who would "dare" to combat them with physicality.
Of course the Jets are going to try and be physical with them. So will every team they play. Why then is it necessary to come out and unnecessarily call attention to it. What's to be gained. Do you really think that Gronkowski is going to be intimidated? All that's been done is give bulletin board material to the rest of league and alerted the refs to be particularly attentive to watch what our safeties are doing.
Needless bravado with nothing to gain except attention.