I agree with you that even higher doses of psilocybin (several grams) isn't that psychedelic (rather interconnected, e.g.)... I don't have enough experience with LSD to exclude its visuals capability, but even its quintessential acid visuals I rarely hear described [as such].

...unlike DMT (recommended) or Salvia (not recommended) or mescaline (neutral), which even at low dosages are strikingly visual. I have only met devils with the latter two. Ketamine isn't exactly visual, but its dreaminess is angelic.