I'm fully convinced the people I know with back pain that a chiropractor fixes are actually just getting stretched by them and feeling better from that.

Though cracking your back does feel great too, for me it's just something that happens as I stretch in stead of a stretch happening when I crack my back

Yeah this is genuinely 100% it in my experience having talked to many friends who are intelligent enough to realize "hmm maybe I shouldn't be letting this barely 'licensed' dude twist my neck around" but will gladly keep going because they've correlated their back feeling better with the appointments. In my experience though if you invite them to a yoga class, or just challenge their ego by saying they can't do Downward & Upward dog into Bow pose and subsequently leading them into it if they happen to be one of your male friends; suddenly they'll realize "wow this is a lot safer and more relaxing....I thought getting my back cracked was supposed to be painful" -- actual thing my friend, whose mother used to take him to her monthly chiro appointments, said to the rest of us after we started doing yoga on the beach one day.