It's a common practice. I've been doing the same thing for the last ten years - Select Heading and arm Approach after the bridge. Then intercept the ILS for backup guidance for the last couple of miles to the runway.
Yes, it's a visual procedure. But the runways are so close, and you often have another aircraft flying a bastardized formation approach to 28L. Accident waiting to happen, and has been for a long time. In my humble opinion, of course.