Without knowing your specific circumstances, another thing to consider is that it's possible that didn't have a scientific approach to measure the precise mass of LSD that you ingested for any or all of your trips. Perhaps you were "lucky" in the sense that you never (inadvertently) received an extra strong dose. And, your biochemistry might be more tolerant to LSD.
Dosage affects everyone differently, hence the current wisdom to play it safe by scaling up dosage systematically.
And while I can never know the actual dosages of it when you buy it the way you do my experiences are pretty consistent with how others report their experiences around those dosages.
I am however not a person who is deep into the philosophical aspects of hallucinogens so for me it is about having a pleasant experience and not to try and learning something about myself.
It could be that I'm one of the exceptions or that I don't realize it but to be honest as common as tripping is I don't see many changing their life or outlook after a trip.
I can never as I only have my own experience but I think that a lot of "deep insights" and changes comes from people thinking that that is what should happen. Like when young teens get drunk from non-alcoholic beer.
I'm not saying it does not happen but I think it is rarer than people think it is and it is rare that a trip will introduce permanent change in someones behavior. I think that people feel that it was a great experience and say that now they will live their life differently but that they slowly just return to their normal life and behavior.