Same here, but with stuff like rice I definitely have to do a decent amount of plate scraping, especially towards the end. It didn't take, but growing up my mom always told me to just use my knife to get the food on the fork when I was finishing my plate. I will say from my research (which could be biased more towards formal eating) the way they eat mashed potatoes is a bit wild to me. Keep the fork in the same position as when you're cutting meat and push them onto the convex side of the fork. For informal eating with something like rice it was fork left hand, but more of an American style of holding the fork. It does make some sense though. Apparently forks used to be straight and the curve was added so that you wouldn't poke the roof of your mouth so holding the fork curving downwards helps avoid that.

I feel like the American style is very much catered towards the culture of tv dinners and convenience around food. At the end of the day it's all just variations in how we decided to do a task across cultures that get the job done one way or another. With Asia we see the use of chopsticks, in India they use their hands for a lot of foods with a refined technique to push the food from the fingers into the mouth so you're not just shoving your hand in your mouth, in Ethiopian cuisine they use a special bread to pick up and eat the food. As long as the food is tasty and ends up in your mouth it's not too much different than something like driving on a different side of the road or different plug designs. There may be some downsides/upsides to one or the other, but at the end of the day it's just a different path to solve a universal problem.