Psychosis is a global mental and mood impairment that distorts judgement and decision making and individual feels compelled to behave and under take actions that are risky,ill judged out of character
For the individual experiencing the psychosis that is their absolute reality,it is their frame of reference guiding behaviour & decision making
Executive functioning like planning, yes it can remain partially/fully in tact but the energies are directed to the thoughts,compulsions that are psychotic in origins because for the individual at that point in illness the psychotic beliefs are real and compelling
As @mawbroon has said it’s really hard to convey the experience of psychosis and it’s overwhelming compelling nature if you’ve never seen it or experienced it. Psychosis really changes demeanour,mood,behaviour,beliefs it’s all encompassing
Increasingly courts and judges are sensitive to mental health and compassionate in sentencing