That’s mainly cuz they go through bottles very quickly! We have so many sauces at my house, it takes a year+ to go through some of the most spicy bois. Definitely need to fridge ’em. There’s only one kind that can stay out cuz i slam through tons of it every time we pizza. Some mango habanero sauce with a… Yorker cap? Whatever you call the twisty pointy cap.
I can see it with eggs, if you don't wash eggs they're shelf stable for a couple weeks because of a natural coating. I was super confused when I went to the UK and all the eggs were on a shelf at the supermarket instead of in a cooler.