Business is not your mommy nor a nobel prize committee, it doesn’t care if you are smart or not. It only cares if you can execute your function good enough to justify your salary and get the project out of the door on time.
If 2 candidates are good enough - the cheapest wins.
Therefore there is no point in marketing yourself. Just learn to play by the rules (i.e. how to pass interviews, make up resumes etc) or get unique and extraordinary in your niche.