In all humility I beg to differ with you that all men should be free to make their choices and interpretations in all things. Less intelligent men are always guided by those who are superior in knowledge in all spheres of life. This principle is applicable everywhere but the guidance must be right and bona fide. But it depends always on the sweet will of the guided to accept this principle or reject it.
I am glad that you have a copy of Gita with you. Apart from the Swamijee's learned interpretations—you can see for yourself what is written in the 18th Chapter 67th sloka. Empiric philosophers may call it a sophistry but is a fact substantiated after all human reasoning offered by Arjuna. It is clearly said here that one should follow Sri Krishna alone. If any body makes his choice not to follow him surely he will have relative result.