Lol, no I don't work for Ugg I just really like them! Have you actually tried a pair of Uggs on?.
Also Uggs actually are supposed to be worn barefoot since they are made of sheepskin which has special properties.
1. Sheepskin when against bare skin naturally regulates body temperature. This means your feet will stay a stable comfortable temperature from -30F even as high 80F. This is how sheep don't overheat.
2. If you are wearing them in a hot room or doing something very physical and your feet do sweat they will still not smell because each hair is made to wick away any moisture then because sheepskin is very breathable even though it doesn't seem to be it will evaporate. If there is any left then sheep skin is also antimicrobial so the bacteria that produces smell has a hard time surviving. So even if all that fails and you wear them for two weeks straight all you have to do is give them a two day break and they will be good as new.
Both of these things can’t work if you wear socks. So, your foot will get much hotter than it needs to be and start sweating. The wicking process also has trouble working if you have a damp sock in your boot. which can cause them to smell. It can also in really cold weather cause the boots to not be anywhere near as warm because it prevents the insulating properties from working. I have proof that this all works because mine, my friends and my daughters Uggs don't smell after Years of wearing them without socks.
other closed toe shoes you 100% should wear socks because they will 100% smell without but Uggs are one of those weird exceptions to a rule that we all get to enjoy the comfort of. Personally I love the feel of the soft fur between my toes and I would not wear Uggs if you were supposed to wear socks with them. Or I would just go without and let them smell fore the comfort they are that comfortable.