You are probably right, and it's odd because if I've learnt anything from my time in science research, it's that science isn't like your school homework or undergraduate exams where there is a right answer. I find the notion that there is some absolute Truth which science expounds not to be useful. A useful thing is to be less wrong and to have a good handle for all the ways in which one might be through assumptions, approximations, systematic uncertainties and so on. The wider relevance of all this is the recognition that technical decisions involve some sort of trade-off and are not necessarily the end of the story. In science it's a healthy thing to have different approaches or formalisms because it gives some confidence in the results if they agree. I don't know if that has any wider relevance.