"that one time I did the stupid thing in high school"? I think most highschoolers do a stupid thing about every eighteen minutes. You did great!

I am imagining my mind recalling and replaying the 'greatest hits of dumb stuff davidw did' more frequently after this treatment and I don't really like the idea.

Almost 20 years after high school here..I am still stupid

You get downvoted, but you are not wrong. People with various anxiety disorders have this problem - and keep remembering all the small mistakes they did in life over the good memories.