That's true for most science though, biology had the same issues earlier in the 1800s-1900s until the field matured. It doesn't mean that all biology from that

That's true for most science though, biology had the same issues earlier in the 1800s-1900s until the field matured. It doesn't mean that all biology from that time was pseudoscience, it was wrong but paved the way to find the right answers. Psychology has its successes, empirically proven by getting results in clinical settings, we don't have deep answers on why some of it works or not but working known pharmaceutical compounds also suffer from that, we know they work but we don't know how (some NSAIDs come to mind, psychiatric meds, anesthesia as well).