I have three seven gallon buckets & have never had a problem with oxidation (and not because I drink a batch in two weeks).
But remember: A pickle bucket is a pickle bucket forever.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk