But if you read the article you’d have seen that prewashing to remove starch makes no difference. That’s literally the point of this article.
“Culinary experts claim pre-washing rice reduces the amount of starch coming from the rice grains. … Contrary to what chefs will tell you, this study showed the washing process had no effect on the stickiness (or hardness) of the rice.”
And traditionally it was washed for cleanliness. The new wash to remove starch is a modern concept some people clearly started to say to sound smart with no evidence or science and it took off. Read the article
Do You Need To Wash Rice Before Cooking? Here’s The Science (www.iflscience.com)
I found this article pretty interesting… it seems to contradict the current cooking zeitgeist