Questioning everything with a caveat means to examine the truth and every detail of it. Sometimes wondering too much about one thing is not good because it might be a waste of time. Other things, on the other hand, are good for the brain to think about.
Usually, the more information the brain is taking the smarter it becomes. Thinking about the rainbow unicorns is probably not beneficial for the brain as thinking about some riddles of the existence but it might be useful to think. For example, what if the bees would stop existing? There would not be a way for some plants to germinate like apples, melons, cranberries, asparagus, or broccoli. None of those things would grow without those fuzzy insects not mentioning the sweet honey that some people use every day in the morning with their tea. If those fruits would stop growing, many animals eating them would die and the omnivores that eat them would die with spiders and over 24 kinds of birds that rely on that food source. Bees also help trees grow and they provide shelter to many small creatures that would go extinct without shelter and the rest of their ecosystem.
Bees are more important than some people think and want them gone when they get bitten by one but if they would stop existing basically the whole ecosystem would be ruined even though the bees are soo small in size.