Direct injection gets you the benefit of in cylinder charge cooling, and should make more power than a carb, with the obvious tradeoff of complexity. Direct injection is out for racing applications... just not common at the 3000+ hp level you are playing with. Pretty much all F1rally/IMSA/enduro/whatever are using Bosch Motorsport DI fuel systems on them. You can also claw back atomization deficiencies with injector placement. Early F1 fuel injection had the injectors pretty much dead center, aimed straight into the individual throttle bodies.

A few OEM's have both port and DI fuel systems on them now, and that is done primarily because of soot production issues at high load. Newer emissions standards depending on the country have a standard for tailpipe soot, which led to the second fuel system.