The techniques in the article right now have had around 95%-100% success at avoiding spam and take about 5 min. to implement. Your approach of putting an LLM in front of your inbox gives 97% accuracy, may have false positives (so you may not receive that account deletion email after all), requires to run inference and, I assume, would take at least an hour to setup.

Also, the two can be complementary, anyways, so I am not sure what your point is.