But both are virtually impossible to steer if the steering head is fixed. Sure, they can move a little, but not enough to be of use.It's easy to steer a bicycle riding no-handed, and motorcycles work the same way
As a teenager, I was able to ride three miles to school without ever touching the bars, but they visibly moved. If they were blocked, that would not have been possible.
As far as chick strips are concerned, my ST2 has none, my SS always some, even though on the same roads the SS is faster. Also, a two-up ride produces less chicken strips than a solo ride on any of my bikes.