I don’t want to spoil anything for you, but ethanol is actually a very reactive molecule — and in some ways, it acts similarly to opioids like heroin. It, among other things, stimulates endogenous opioid pathways, leading to the release of β-endorphins and activation of mu-opioid receptors. So, alcohol works indirectly, heroin directly – but both enhance opioid signalling. If you’re curious, this study explains it really well:
Food activates it within normal biological limits, alcohol and heroin artificially push the same system far beyond normal range, forcing the brain to compensate by downregulating receptors or reducing endogenous opioid production, so it's totally legit to compare alcohol to heroin
I think it's incredibly naive and arrogant to tell billions of people who use a product through their own free will "ackchyually its really bad and you should stop".
Almost everyone would give you a response similar to mine. They use it because its easy way to plan events since so many people are on it, or a small business can easily create a website, sell something or just kill some time on the can.
Would you say the same about cigarettes? Billions of people used to smoke it as well, it was (and still is) quite popular, is it arrogant and patronising to tell them: this is unhealthy for you, and affects society in harmful ways?
This is extremely naive and akin to asking "why do people drink if it’s bad for you then??" Popular != healthy