I recently had this discussion with my daughter so I will repeat what I told her.
If you were called to a career in politics, would you run for the senate this fall? Or would you take political science classes, and public speaking courses, learn world history, be an aide for a few years?
If you wanted to run a marathon, would you train for it? Or just go out and flail away?
Are your future spouse and marriage as important as, or less important, than a marathon or a career?
If you do the minimum in preparation, what do you expect the results to be?
If the Church is providing you a way to prepare for the most important decision of your life and you do not want to participate in it, why do you want to be married in the Church?? (I am not trying to dissuade you from being married in the Church, but you are begging the question). You could be married on the courthouse steps. If you want to be married in the Church, there must be some value in the process that is being proposed to you.
Marriage is a BIG commitment. You need to go all in.