Partially agreed - tolerance is strong but 300mg of psilocybin is a huge amount. Mushrooms tend to be 1% or so psilocybin by weight, so that’s like an ounce. People don’t typically eat an ounce of mushrooms. Upper dose tends to be 1/4 of that.
Specifically: if you're eating an ounce of mushrooms on the regular, then you are no longer 'micro' dosing, and there's a non-zero possibility that you are working on an article for Rolling Stone and just forgot.