Summon has never been advanced to a degree of unsupervision.
As a matter of fact, Consumer Reports complained that it didn't have a continuous push option and an instant abort if the control is released so Tesla has made that option available.
Current AP1, AP2, summon, autopark, AEB... still need human supervision.
It is not a matter of trust. It is a matter of being ready for the limitations of current system.
The limitation of the current system is that you can't trust it.