These guys have been snorting silage. You are entirely correct about the leakage, it would be fluid out, not air in. Spigots make racking and filling much easier.
[Sounds like a couple of jealous glass-junkies. They can't use spigots, so that proves spigots are EVIL!]
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