Best analogue I’ve heard is to think of it like email. Google can run Gmail, Microsoft can run Hotmail, and countless others can run their own email setups and everyone talks to each other just fine.
The fediverse is the same. Lemmy is made from a bunch of randos running their own Lemmy servers, but we all interact like it’s one big Reddit-clone.
With all the health implications of alcohol that’s not a bad problem to have. Might be worth remembering that any time you do go somewhere that’s heavily “alcohol culture” there’s a lot of people there wishing they were you.