1rst. Yes single use cocain in animals causes unusual neuroplasticity, we can prove it. Citation: https://www.frontiersin.org/articles/10.3389/fnins.2020.5898... Favorite quotes: "For the first time, it has been demonstrated that a single low dose of cocaine, which can cause no locomotor behavioral and brain metabolic changes, can induce structural damage." "It is essential to alert the population even against the consumption of low doses of cocaine."
Changes are much more pronounced in long term exposed animals, please work through the publications originating from the grant for "Cocaine-induced neuroplasticity: a new role for TGF beta signaling" Link: https://grantome.com/grant/NIH/R01-DA037257-02
2nd. Memory is devilish complicated, but AFAIK the current state of knowledge is that short term memory ( which I normally would expect to be the main memory for a single incidence trial) is not due to anatomical changes in the actual neurons, but a complicated mix of neurotransmitters, spiking, vestibules etc.
So saying that every interaction leads to a measurable change in the brain matter is most probably wrong.
Please read: https://molecularbrain.biomedcentral.com/articles/10.1186/17...
To verify that.
So summarizing: No not "Everything causes neural rewiring", and yes my sentence had quite a lot of content, but normally people stop listening when I start quoting studies in a conversation.