Well. I'm chime in again Cactus (You guys are probably saying Oh No!)
Some of your common sense thoughts could of course be taken to ridiculous extremes as I'll show. Many products of today are packaged in Plastic Containers, such as many Petroleum products, Acids, Alkalis, and I'll save space by listing the vast number, but I think you, and all get the picture that because these products can "live" in a plastic container, certainly would not make them suitable for use.
I'm 53, I've been playing with vinyl probably since 1962-1964. Who knew back then to clean a record? Records were basically cheap throw away items. To get through a scratch, the old Nickel came out, and got placed on the Tonearm. (How about that, they did call it a Tonearm back then!)
I took a major jump around 1973-1974. A Pioneer PL-51, and Shure V-15 Type III, the Cartridge I still have, and still looks, and plays like new, now sporting a Jico SAS Stylus.
I've been through every product one can virtually think of. I don't think Discwasher even had a "D" designation (D2, D3, D4) when I began using it.
Again, with common sense analogy, Tide Clothes Detergent "could be used" to Shampoo your hair with, and your hair will come out nice, and squeaky clean, and hey, even a nice scent to boot, but,.... would you want to use it on your hair? Maybe some people would, and do?
Coming up to the present, yes, I'll admit, I have many beautiful records, quite a few MO-Fi's as well, and you seem to speak of these with an air of disdain, in that I get the impression that only perhaps a fool with money to thow away should have these in his/her collection? Perhaps I'm wrong about this, so forgive me if these assumptions are incorrect?
If these products work for you, and you feel comfortable using them, then by all means that's great. There may be others, who will follow, and say, "Hey, Cactus sure came up with a really great cleaning method, and he's made a believer out of me", sort of story.
I'm sure you would agree, what might work for you, would not be the best choice for others, just as my choices-methods may not work for you, and others as well.
At the present, it now does certainly appear, that Vinyl does not have to be a "throw away media" with a limited use life anymore. Knowledge, and better products seem to have assured that Vinyl can last a lifetime with proper care-storage. Who ever would've thought-believed this 40-50 years ago? I certainly didn't.
It might be hard for some to fork over $20, and $40 for a good known to work cleaning product, but when you spread that cost to how many records that can be correctly cleaned to better than fresh from the jacket (Yes, even those thrift shops jobs come back to life admirably) then the cost is really not an issue I feel.
Each one of us individually has to come to grips with what should they be using, what results do they wish to attain, and if money is an issue, then how much should they spend to satisfy thier own needs?
As "Craze" said in the movie Full Metal Jacket, "These are great times we are living in Bro". With the re-birth of Vinyl, we now have so many choices, and options at our disposal. Mark