It is quite irresponsible to take a psychedelic drug and then drive a car.

So called microdosing of psychedelics is generally rubbish, the way they're distributed means you have no idea whatsoever what dose you're actually taking and if you want to live with a 5-HT2a tolerance, just go on a trip dose and you're good for a few months.

Edit: And with some of these substances one should expect cardiac toxicity if dosing every day, due to serotonin receptors in the heart.