Prediction markets have a built-in incentive for accuracy that's absent from broadcast news. It's useful to have an aggregate answer to things like "how likely is Russia to invade Ukraine" that is to some degree shielded from the normal filters of partisanship.
Or from another angle:
Changing your individual vote in an attempt to shift the outcome of an election is extraordinarily unlikely to actually make the difference, so prediction markets most likely punish people (with losses) who try to game it with their own votes. If you and a large group of people plan to do this, that will be priced into the market, preventing you from profiting very much.
Or from another angle:
Changing your individual vote in an attempt to shift the outcome of an election is extraordinarily unlikely to actually make the difference, so prediction markets most likely punish people (with losses) who try to game it with their own votes. If you and a large group of people plan to do this, that will be priced into the market, preventing you from profiting very much.