I think you took a look more from this than most of us. I found denying the existence of children to be a rather poorly justified in the article but you provided a decent justification.
I think parents often treat their children as children because of the formation of habits that start from the child being a baby. They get used to them being helpless, design their behavior around that, and then fail to notice when that situation changes. When this occurs it almost become the child’s responsibility to say ”Hey, I can do new stuff now!” periodically (most frequently in teenage years), at which point it is usually ignored. Another reason: letting your kids do the stuff that you used to do for them means letting go of some control. Parents worry what would happen if they allowed their child to do the things that they do: “Sure I could let my child cook their own meals but what if they just cooked lots of unhealthy food.”
I think parents often treat their children as children because of the formation of habits that start from the child being a baby. They get used to them being helpless, design their behavior around that, and then fail to notice when that situation changes. When this occurs it almost become the child’s responsibility to say ”Hey, I can do new stuff now!” periodically (most frequently in teenage years), at which point it is usually ignored. Another reason: letting your kids do the stuff that you used to do for them means letting go of some control. Parents worry what would happen if they allowed their child to do the things that they do: “Sure I could let my child cook their own meals but what if they just cooked lots of unhealthy food.”