If I understand your question properly, The ITP called out random inspections only without specifying specific points.
That would be why your superior has made that statement.
However; The question comes to my mind that if this is the orginal ITP, and the person is your superior, where were they when the ITP was approved and written, and why were those points not specifically called out????
It smells like an exercise in rear end covering to me utilizing the FDHR method. (feces down hill roll)
I have seen the amount of inspection go up and down on pipe piles during manufacture. The most recent ones I worked on required 100% Visual (100'+ connectors) with 25%MT, followed by the same with the end user rep and then a partial by another organization for auditing purposes.
One thing I don't like about the amount of inspection changing, is what did I miss before that may be an issue in the future or cause a problem. I would feel if a partial were done before, then the requirements changed to 100%, then all previously accepted items would be "in question".
It easy to take for granted something driven in the mud! But as an inspector, all I can do is go with the requirements and trust in the engineers that designed it and indicated what amount of inspection was required.
I have decided that I would much rather be an end user rep on one of these jobs than the person in the shop.