I am at about 70 wpm and I do semi-touch typing. I can type without looking at the keyboard 95% of the time (symbols etc. are tricky), but I don't use all 10 fingers (pinkies are pretty much unused) and do not rely on having my hands in the 'home' position.
Doing the 10 finger based home position approach almost immediately feels incredibly restricting. Some things like typing a C with my middle finger feel like I am doing something counter to my anatomy (when would you ever make such a movement naturally? let alone hundreds or thousand times a day?).
I wonder whether it is just a lack of getting used to it or whether people who do the full on touch typing a lot just fuck up their body regularly.