I don't disagree with much of what you say but if you are getting a close comfortable shave with a SR why do you need "lots of time to heal"?As stated above, a SR razor can be honed to any degree of sharpness you want. Moreover, there is a great range of sharpness to DE blades so a particular SR may be sharper than a particular DE blade or the reverse is possible as well.
May I suggest that sharpness is important but not paramount. It is possible for an edge to be too sharp. While I don't use a DE, I do use a SE for clean up and the back of my neck after a SR shave. I can tell you that Feather SS single edge blades are too sharp. I always get a weeper with a fresh Feather FHS-10 blade on the first shave no matter how careful I am. After that, everything is fine until I think that I need to replace the blade.
I really don't want a SR edge that is that sharp. It means that my technique would have to be perfect every time to avoid weepers. I just want it sharp enough to give me a close comfortable shave with no drama and no blood. That is less sharp than a fresh Feather blade.
The big difference between SR shaving and DE shaving aside from the technique is the safety bar. Think about it. You spent all that time making that beautiful cushiony, slick lather and then before your DE blade edge gets to it the safety bar has wiped it away!
With a SR, there is nothing to remove the lather from your face except the blade edge, and I would contend that it is much easier to control shave angle with a SR than with a DE. As a result, it is a much gentler shave than any razor with a safety bar. (An open comb safety razor gets closer to that).
So, my experience has been that the SR is much gentler to my skin, and with two and a half passes gives me a close comfortable shave that I can stretch to three days with an electric razor touch up on day thee. This give my face lots of time to heal and my skin looks 10-20 yrs. younger than I am. So say the ladies!