Does wine and food pairing actually make a difference?
Yes, but the mechanisms are narrower and better understood than the elaborate pairing charts suggest, and most of the rules that matter are about chemistry rather than tradition.
What genuinely happens:
Tannin binds to protein and fat. Tannins in red wine are astringent because they bind to proteins in saliva. Fat and protein in food bind them instead, so a tannic red tastes softer with a steak. This is the most robust interaction and the real basis for red wine with red meat.
Acidity cuts richness and resets the palate. High-acid wines make fatty, creamy or fried food feel lighter. This is why sparkling wine works with almost everything rich.
Sweetness must match or exceed the food. A dry wine tasted after something sweet appears sour and thin. This is why dessert wine must be sweeter than the dessert.
Salt suppresses bitterness and tannin and increases perceived fruitiness — salty food makes wine taste better, reliably.
Chilli heat is amplified by alcohol. High-alcohol wine makes spicy food burn more; lower-alcohol, slightly sweet wines suppress it.
Umami increases perceived bitterness and astringency, which is why some pairings with mushrooms or aged cheese fall flat unless there is salt to counteract it.
What is weaker. The vast specific pairing charts — this grape with that dish — are largely convention and marketing. "White with fish, red with meat" is a crude proxy for the tannin and acidity effects above, and it fails constantly: a light red works with salmon, a rich white with pork.
A structural principle worth more than any chart: match intensity first. A delicate wine is obliterated by a powerful dish regardless of colour.
And the honest caveat: individual perception varies substantially, and expectation strongly influences reported enjoyment.