Knowing how to use Google (or another search engine) is probably the biggest multiplier of all. Odds are someone has done something on the sort of problem you are trying to solve.
Those are exactly the things that anybody else could do just as well as you. What makes you valuable (if you are) is exactly the things that nobody can just as well look up on Google.
They could, but generally they don't. There is some truth to what you say, but if you've worked anywhere for very long, you'd also realize most people are very, very bad at looking things up on their own! They'll try to reinvent the wheel when the wheel already exists (or almost.)