So where do you wish to move on to, Bronx?
In this particular case the guy was indiscussably unfit to fly.
An employee of the airline industry (motto - we are all responsible for flight safety - not just pilots) reported this as best he saw fit.
The pilot didn''t fly.
The passengers and crew are all inconvenienced but safe.
Sure it isn't nice to be caught. It could perhaps have been done more discreetly BUT - as you yourself suspect, the security man was not trained in this specific case. He did his best to prevent an accident.
To my discredit, I once flew from Nairobi to - er Europe after the FE and I had become aware that the captain was probably under the influence of alcohol. We later had to correct several situations in flight as a result of this. I am not proud of this action and wish I had had the moral courage of this security man.
As far as I am concerned, the only way to "move on" is for us all to get quite a bit more responsible on the subject.