The previous commenters make a lot of good points! But...
My issue is that in the article, one theme is that "if there is no peer reviewed study, then the issue is not valid." The important thing to always remember, is that no information does not make a point invalid. it just means that someone needs to actually test the hypothesis!!
Further, in regards to the soap detergent question, a good rinsing is all that is necessary to rinse off the majority of the soap/detergent and you won't get sick or even have an upset stomach.
We have not had any ill-effects from using THIS process: fill the sink with warm water to a depth of 4-6 inches, give it a shot of dish detergent (as if setting up to wash dishes), dump the fruits or vegetables in so they are covered with the water and rub each one to make sure the solution covers the entire surface. Scrub rough items like potatoes with a brush. Let all these items sit in the soltion for at least 5 minutes. Then remove them in a collander or sieve and rise thoroughly (a couple of minutes) with a spray of fresh water from the tap. Drain and air dry on a clean surface. Store in the usual way, fridge, closet, pantry or usual place, after they are completely dry.
Keep healthy, avoid the corona virus...