I think that LSD takes away your ability to ignore things. That applies to things around you, hence the feeling of enhanced perception – your brain no longer filters out all the things cracks in the sidewalk that you normally ignore. This is independent from the hallucinations, of course.

But it also applies to all those thoughts you’ve been ignoring. Hence the life-changing insights people report having; in your case I think you were subconsciously aware that you should quit drugs but didn’t want to confront that thought. LSD made you confront it.

(By the way, that’s also why I think people with unresolved trauma should be very careful around LSD. Being forced to deal with your repressed shit all at once can go very badly depending on what you’re repressing.)