Yes, that is the point. Juries are our justice system’s protection against abuse. If the crime was bad enough for police to sweat someone for 12 hours, then having a jury watch for 12 hours seems a reasonable check and balance - after all they might be saving weeks that would be spent on a trial if there were no confession.

And it puts sunshine all over police interrogation practices- if they are acting professionally then that will show through, but if they are abusing someone that will become visible as well.