Question: are there any guides out there doing backpack hunting that use trail runners for the majority of their work? I always find it instructive to look to the people that do this stuff for a living.
Professionals aren't immune to groupthink, and small, insular groups can be more vulnerable to it. Ever seen wildland firefighters still sporting high-heel boots? They are quite attached to them despite there being numerous better options they are slow to adopt.
Also I've noticed a lot of professionals (in many fields) are too busy doing their jobs to contemplate novel alternatives to the old standbys, that is a job for casual amateurs, or outsiders with new perspectives.
As Dave said, switching to less supportive footwear can be a LONG process, and is not something you can dabble in for a season and decide if you like it. I suspect many people have tried the switch and immediately rejected it because it didn't feel good (ask my calves). I tried my first multi-day trip in shoes for quite some time, (I've always been a light boot guy) and I came home with burning calves and stabilizer muscles I haven't used in quite some time. The shoes I wore where very sloppy (altra lone peak 2.0) so I think I was putting a lot of muscle into just keeping my foot from sliding off the sole. The bottoms of my feet where always sore and tired at the end of the day, but I noticed they bounced back much faster then my legs as they where always fine the next morning.
I'm going to keep working at it for curiosities sake but I will probably stick with boots in general for several reasons:
-I'm lazy, and building all that foot and leg strength looks suspiciously like work.
-I like to be more careless about where I put my feet, in certain terrain light shoes have me looking at my feet more then the scenery
-Due to the oddities of my own feet I have an easier time lacing stuff securely around my ankle then my foot
-Despite there being many gaiter solutions, tall shoes are the path of least resistance in keeping debris out.
-I do prefer more foot protection on the topside, it certainly isn't needed, but I like to have a wide margin for being careless
I will certainly contend that many boots are a self fulfilling prophecy, anything with a tall, narrow heel (even some Lowas I've tried) can cause lots of "jeeze, I almost rolled my ankle just then, good thing I'm wearing boots!" moments. I'm not holding my breath, but I'd love to try a zero-drop boot with a thin, PU midsole.