That sounds like a nice plan when you have neutral or good relations with the Americans. The truth is that we don't have good relations with the Americans. Worse, our relationship is mired by mistrust and deceit. Books have been written on this ugly relationship. None describe it as positive.
The US has one primary objective in Pakistan. Every move is eventually meant to transform Pakistan into an Indian colony and decouple it from China. Ever since China invested in Pakistan the Americans are enraged. The Americans always had a sinister plan with Pakistan. The Americans never forgot how Pakistan transgressed and became the sole Islamic nuclear power. They were always going to come back and undo this cardinal sin. Not only that, Pakistan is also accused by the Americans for destabilising their project in Afghanistan. Of course the list of American complainst against Pakistan is much longer, but you get the gist.
In short, the Americans are never going to simply trade. They would seek concessions and impose conditions which are detrimental for Pak. In fact this is already happening in another form through IMF loans. We have been here before. This is the same old. Let's not pretend the Americans are here to simply do good old commerce.