I couldn't agree more. You get to a certain point in life where there are some things that shouldn't be a concern or worry any more.
I basically do it to make sure that the blade is clean before the next use so a view of the base plate side provides the opportunity to flip to the cap / silo side.
I remove the blade from the razor after each shave, hold it under running water, and give each side a swipe or two with my brush. I then pat the blade dry on a towel, flip it, and store it in my homemade safety holder. I have no idea if this practice makes for better shaves, it just seems like the right thing to do.
Even if you tossed your 12 cent blade after each shave, you would get 33 shaves for what it costs for those $4 cartridges. FYI I do arm strop my blades but do not flip intentionally. I usually just do a week, but back during the Federal Government shutdown in October, I used a Shark Super Chrome for 17 shaves. It could have gone further, but I retired it after the 17th shave. It outlasted the shutdown.
If I HAD to follow that process I'd be back using electric razors quicker than quick Having said that if it works for you then that is all that really matters.
Nobody has been able to scientifically prove it. It's something you have to try for yourself, then see if you think it works or not.
I have never been a blade flipper. As a matter of fact, it never crossed my mind and I did know this was a practice for some shavers. As the saying goes, different strokes for different folks - no pun intended.
I flip my blades. I take the blade out of my razors after each shave. I rinse it off with warm water and pat it dry with a towel. I then put it in the paper sleeve and in the cabinet with the door ajar next to the desicant packs so there is no chance of rust. The only razor I do not do that with is the Auto Strop razor.