Yes, both are me. Welcome to The Lightweight Backpacker!

I resisted the switch to trail runners for years, thinking the same as you about ankle support. Finally I had to switch--I could no longer find women's boots that weren't Goretex lined. Goretex turns my feet into a sauna, and takes days to dry if the boots get wet inside.

I used to turn my ankles any number of times in boots. To my great surprise, in my first pair of trail runners (Montrail Hardrocks, long since discontinued), I tried really hard to turn my ankles on purpose but couldn't. I haven't had an ankle-turning episode since I switched! It's actually the footbed of the shoe that provides the ankle support, not that little bit of leather (or padded nylon) around your ankle.
May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey