alt Hacker News> probably borrowed the term from behavioral scientists
It's from epistemology. It is not there to refer to the subjective but to the objective.
> A similar thing happened to "object oriented" which has been misused by philosophers and visual artists alike
For instance?
In the 1990s "Object-Oriented Ontology" was introduced by Graham Harman [1]. The name was borrowed from computing, but its meaning has little or nothing to do with Simula or Smalltalk.
[1] https://en.wikipedia.org/wiki/Graham_Harman