I would think it would be pretty hard to get through the bead (steel cable is what it feels like) without damaging the rim.
its called the LERNIN Curve.. and no its not about counter steering.. Doing something as nasty as changing tires can be intimidating. if you never done it b4, or never had someone who knows how show you and/or help you, and Worse if you attempted it on yor own and managed to f the thing up.. Well then you don't ever want to go down that road again.. Butt if you have a good experience and realize there is reason many of the old hands still do this, well then it would be like telling somebody you don't change yor own oil because you don't want to get dirty or have to go buy oil/filters when you can just drive in and pay somebody to do it.. but hey, I still pull my wheels and let the kid do it for $20.. not cause I mind getting dirty,, I am just lazy that way. ponchoHer!! Romans just refer to me as brave, only cause I manage to tackle my tires on my own. I might not be as useless as I thought wrenchwise.
B'sides, 4 me doing stuff to my rig is part of the fun, only bout 25-30% of the fun but still part.