"It helps to reframe the issue. "Selling" yourself is distasteful for many, because it smacks not only of loudness & brashness, but of straight up lying."
I think a lot of folks think franchise auto dealers or traveling Hoover reps when they think about "selling". I've always found that sort of "get someone to give me their money for something no matter what" process is better equated with "hustling".
I have a few great relationships with real salespeople through my work, and for them it's about lining up their products with the people that truly need them for the price the products need to sell at.
I've tried to learn that as a lesson for self-advocacy and network building as well. I actually don't mind a cold call on LinkedIn from someone where our work might really benefit each other.