The market itself will be obsolete if the future become knowable. Until then price will move and what more does a trader need?
The confidence that they can win? There has always been a cutting technology edge – It has never produced a single superior trader in the past that others have feared to the extent that it has undermined the size of the price speculation pot.
Even if the pool brought to the table for betting on price is wiped out by the existence of a superior price speculator, people investing for the return from the underlying asset will not agree value without absolutely knowing the future – so there surely will still be a pool from directionally front running that disagreement that a good trader can compete for.
The markets are a mechanism for pricing the risk arising from an unknowable future – unless psychics are going to rule the world adaptable traders won’t ever be obsolete.