Interestingly, automated parallel parking systems are allowed to be used during road licensing tests in the area where I live, to demonstrate parallel parking competency. Same goes for all driver aid systems, including Tesla FSD Beta etc. Bit of a head scratcher for me.
This approach really shows when you use our public roads. People largely either do not know all the rules and best practices, or don't care to follow them.
So I would not correlate the driving test difficulty with the behavior on the roads.
Also, I don't understand why you'd blame the system if anyone gets "trapped" - you have your own eyes, no? Even when you park manually you have to judge if others can still leave. If the computer parks for you in such a way that makes others unable to leave.....then park somewhere else????? What is it with absolving people of personal responsibility all the time.
Or you can just live in a less crowded place so you don't need to parallel park :P
Unfortunately the system in the video still requires a significant bit of space.