Yeah, it's just that often ketamine is looped in with the other psychedelics when people refer to them, especially in a clinical context. Similar for MDMA or sometimes even cannabis with high THC content.

I also found the mood/motivational effects of mushrooms lasting for months, and the insights useful for years. Even more with DMT/Ayahuasca, although the latter is not suggested/considered for clinical use yet so openly, but they have very long-winded traditions. My personal favorites were psilocybin (mushrooms and also tried in pure form once) and Ayahuasca. I never repeated the latter much but, with mushrooms, more than ~5 experiences within a year actually hindered it rather than increased the effect (and I regretted not taking a break earlier), and definitely no more times than 1x every 2-3 months. Only tried Ayahuasca in that retreat, during one week, involving three sessions, but it's given me so much food for thought, I haven't felt a desire to repeat ever since.

I personally found the acute psychedelic effects immensely interesting and fun, but I know not everyone enjoys them, and there is some serious contraindication for people who have known psychotic conditions. There is a recent research study showing that someone who suffered from very severe depression and was apparently prone to psychotic states also benefited from psychedelics, when the drug was administered together with an anti-psychotic. Apparently the patient had no hallucinogenic/psychotic effects, but still has mood benefits. That person got a lot of drugs, maybe a bot excessive IMO.
Frontiers | Treatment of a Complex Personality Disorder Using Repeated Doses of LSD—A Case Report on Significant Improvements in the Absence of Acute Drug Effects | Psychiatry