Good point, but I differ in opinion. As potential officers, we should also be capable of not bragging about where we're going after the boot camp session is over with. It was done successfully in the Army and the Air Force (we also already go to MEPS with enlistees too and that went well, at least for me. In fact, I was the ONLY OCS applicant). Boot camp is by definition getting people in shape for the Navy. That's physical and mental shape, not only fitness.
I could see less people rolling to H class at OCS if they're forced to do boot camp first. And I believe that's for anything: appendix B related, fitness, RLP. It also lends perspective I think, to start at the bottom and work your way up. After all, if you can't perform through boot camp, what makes them think they deserve to go to OCS?
That's my perspective and it is shared with a number of retired and veterans. It was actually an enjoyable talking point with the O6 SWO I had my interview with, it isn't an outlandish idea at all. He told me it has even been thrown around.
I ultimately think it says a lot that at OCS, candidates are trained by enlisted personnel.