They won because today's track happened to suit their chassis configuration โ Red Bull's season-long points lead is the actual story.
Maximum downforce setup carries an inherent advantage on this ultra-high-speed layout. It's not a performance gap, it's track-characteristic alignment. Take the same cars to last month's low-downforce venue and you get a different result.
Season standings: Red Bull leads by 24 points. The next four circuits are all characteristics-neutral tracks. That's the real test. One circuit result tells you nothing about the championship picture.