Well there's a whole lot of ocean one doesn't need to be stealth to fly over but really, your comments read like endless goal-post shifting from someone who has a preferred solution in mind and is working backwards to justify it. Also the SR-71 was never stealth, only reduced observability. The USSR was very aware of the overflights taking place.
It seems no one else offered any other concrete uses that would justify the efforts that went public regarding the frame reuse.
That likely concentrated the discussions towards this single idea I presented. However, I'm not actually that committed to it. If you have any other, I would very much would like to hear about it.