I would be very careful about advancing a rationale that downplays the value of a university’s minor because you are soon going to go to a bootcamp introducing Data Science. One course at university is 40 hours instruction plus 80 hours of homework. How many weeks full-time will this bootcamp last? I think you risk irking whoever is reviewing your application by suggesting that your not as yet experienced brief exposure will make you too advanced to take advantage of a minor. This seems very cart-before-the-horse to me.
If the bootcamp is in January then applying RD makes more sense and should increase your chances. If you write the application after the bootcamp, your argument wouldn’t be that you will soon be exposed to this field at a bootcamp and know so much about it that your current university will not be able to contribute usefully to your development. Instead it would be that you have had this amazing learning experience, are incredibly excited by what you have learned, and are keen to learn more. You can see already that a six course minor will not be enough since you want something closer to immersion to get the maximum amount of knowledge you can etc., and that after carefully reviewing university x’s courses, research opportunities in this area, internships etc …
Good luck!