Wine making would have been discovered by accident,
but not beer making

Disagree, Bill - all it takes is a "soup" made of crushed grains, water and perhaps a bit of honey. The air gets to it, thus natural yeasts, and bingo. For sure it would taste bloody awful to start with, but then it's the long process of refinement, which includes the serendipitous discovery of malt-making.

There's a fine line between accident and invention, as witness your Roast Pig story