Ah, another Facebook kerfluffle.
The statements in the first few paragraphs are accurate. NaOH and KOH as purchased and used by modern soap makers do not exist in nature. They are hazardous chemicals produced by large manufacturers. Soap is a surfactant (a "surface active agent" in that it is able to help water and oil to mix) and a detergent (a type of surfactant that functions as a cleanser).
On the other hand, the last paragraph contains the writer's own conclusions, and they are not necessarily accurate.
Yes, modern soap makers choose to use strong alkalis (NaOH or KOH) purchased from large manufacturers. We do this because using purchased alkali is easier and more convenient. Also because these chemicals are relatively pure, we can make soap that does not contain undesirable impurities.
But the writer does not seem to realize that NaOH and KOH can be made from chemicals that
are found in nature using simple methods you can use in your kitchen or back yard. Baking soda (sodium bicarbonate), washing soda (sodium carbonate), and potash (potassium carbonate) can all be found in nature. Examples of minerals that include these chemicals include natron (used for mummification), trona (mineral found in the arid states in the western US), and ashes of wood and other plant materials.
The writer also does not seem to know that soap can be made directly from these natural chemicals. You do not HAVE to use KOH or NaOH to make soap. The first soap made by humans was probably a mixture of wood ashes bound together with fat. As time went on, people learned that heating this mixture of fat and ashes would eventually create soap. Natural decomposition processes also produce soap. For example, grave soap (adipocere) forms when bacteria decompose body fat into a type of soap.
So, to refute the writer's last paragraph -- Soap
can be created by natural processes. Humans
can make soap with chemicals found solely in nature. Given that soap can be made using chemicals found in nature and processes that are naturally available to living organisms (including humans), therefore soap is
not a synthetic detergent.
The writer can argue they want to the contrary, but their conclusions are based only on a narrow and biased understanding of the chemistry of soap making. In other words, they only know how to make soap the way they make soap. They do not have a full and accurate appreciation for ALL of the ways soap can be made. Their conclusion is incorrect.