For BIM and CAD manager “types”, it’s usually baked into our DNA to want to know everything. That’s a great motivator.
But it shouldn’t be a limiter.
Nobody likes a know-it-all. We’ve all learned this through the years. More importantly, there is a sense of incredulity when you work with that person that ALWAYS knows everything.
It’s 100% OK to say “I don’t know” or “I’m not sure.”
The skill you need to have and to constantly refine is your ability to learn something new. Because “I’m not sure,” should typically be followed up with “but I’m going to try to find out.”