From my husband:
hello99, thank you for properly quoting the Beis Yosef not only b’sheim amro, but also from its proper location. It has bothered me that many people mistakenly attribute these statements to the hakdama of the Shulchan Aruch. Rabbanim have pointed out to me that the Mechaber follows the “big 3” rishonim significantly less consistently in the Shulchan Aruch than in the Beis Yosef. I would love to someday see a kuntres that goes through the Shulchan Aruch methodically to check its consistency with the “big 3”.