I’d think of this kind of like sending a thank-you note: Neither is likely to be a deciding factor on your candidacy, but both take minimal time and make you look more polished, so it’s hard to find a compelling reason not to do it.
If we can’t directly observe the market for a mate, we only really have two options if we want to determine people’s preferences: ask people their preferences or observe the outcome of the market.
Neither one of these options is satisfactory though.
Not like “this person is horribly flawed,” but more like, “huh, I wonder if she’s less keyed into professional trends.” It’s not going to stop me from hiring someone …
but there’s also no reason not to just throw together a profile and have some reasonable presence there.