I think perhaps the benefit of 10-finger typing is that a lot of energy has been put into teaching it effectively. I can agree that my style of typing is not inherently better than my 2-finger typing friend, and my version of 10-finger is certainly in some ways heterodox from what I was "taught" to do, but that doesn't change that I was forced to learn 10-finger typing and it taught me to actually type well, and my friend can't type for shit, to a degree that it genuinely prevents him from thinking through a keyboard as effectively.
I think perhaps the benefit of 10-finger typing is that a lot of energy has been put into teaching it effectively. I can agree that my style of typing is not inherently better than my 2-finger typing friend, and my version of 10-finger is certainly in some ways heterodox from what I was "taught" to do, but that doesn't change that I was forced to learn 10-finger typing and it taught me to actually type well, and my friend can't type for shit, to a degree that it genuinely prevents him from thinking through a keyboard as effectively.