Theology exists because philosophy excludes its fallacies, and philosophy exists because science excludes its fallacies. Science exists because math excludes its fallacies. Math exists because logic excludes its fallacies.
The question is why there is a demand for those excluded fallacies? Why? Either to bridge the gap between one stage of ignorance and the next, or to use fallacies for the purpose of conducting some sort of fraud.
Philosophy just means ‘we don’t know enough to write history, law, science, and mathematics yet’.
Philosophy serves as young adult literature that prepares you for adult literature: history, law, science, and mathematics, just as children’s stories, fables, and fairy tales prepare yu for young adult literature.
Its storytelling. Stories provide context for history, law, science, and math.
So in that sense, the reason philosophy is largely dead, is that history, law, science, mathematics, and logic has rendered it young adult moral fantasy literature.
The knowledge required at each state of declining ignorance is much greater than the previous.
(I’ve had to master a lot of fields as a judge if not as a craftsman. It took a very long time. I had the luxury of the wealth and time necessary to invest that time.)