Purely rhetorical: why is it important that philosophy is taught as the history of thought, rather than attempting to make it more scientific? Perhaps philosoph

Purely rhetorical: why is it important that philosophy is taught as the history of thought, rather than attempting to make it more scientific? Perhaps philosophers who were important and popular 400 years ago had really bad ideas that are no longer worth thinking about. The history of mathematics is interesting, but learning how the ancient babylonians did mathematics doesn't help anyone learn category theory.