The reason my advice isn't irresponsible is because microdosing LSD has no downsides. If it doesn't work, nothing breaks. Try something else then.
Depression is a real life-killer, and if 10 people tried my advice, and this worked for only 1 of them (although I think at least 5 would), then this advice has essentially saved 1 life, while not harming the others.
[0] https://medlineplus.gov/ency/patientinstructions/000795.htm
There are downsides to LSD. Illegality is probably the biggest. Here's a self-study showing micro-dosing is pointless (for the person) and possibly has harmful trends: https://www.gwern.net/LSD%20microdosing
But I don't think it's safe in arbitrary settings at a high dose, so I am reluctant to say it's safe in arbitrary setting at a low dose. It can open you to traumatic realities as much as kind ones.
Probably most people with depression are over perceiving the harsh, but some are actually in serious harsh harsh and LSD might make that worse. Don't know. Talk to your shaman.