I think* it has to do with not wanting to say something as 100% truth without knowing it's 100% true. Which can be interpreted as weakness/insecurity among more business/marketing minded folks.
Closest I got was: not being introduced to (or not inspired by) xkcd's ten thousand https://xkcd.com/1053/
Ever since I read that one I've loved being able to introduce people to things rather than doing the question mark "you should know this" sort of reply