I know your position is that the past is valuable but that we shouldn't cling excessively to it in a navel-gazing way

You are absolutely correct :)

I think that could also denote a psychopathology of sorts.

Please see Mnemophobia

Memories is one of my favourite topics in psychology! 😍 Thank you for the article. I have skimmed it, but will properly read it tomorrow at the hairdresser's 😅