One handed isn't only about typing. It is overall day to day life. Try drinking something from Starbucks and walking to a class with a Note 5 in one hand trying to read emails or read a few headlines from your feed. Pretty hard to do. Overall in day to day scenarios one handed phones win out.
I do this though is what I am saying. I have adjusted to being able to one hand my device for reading news apps and such. I do it daily -- Typing is the only thing that seems impossible for me one handed but it was also something I never did one handed anyway.
So for me (and most likely some others) it doesn't really win out since it never really was a win or lose situation. I am able to simply do it because I kept using big phones and adjusted.