In general, pumps can blow much harder than they can suck. And all pumps are limited to a certain quantity by which they can raise the pressure from inlet to discharge. In rockets, we often rely on tank ullage pressure, and then on two stages of impeller-type pumps. In airplanes we often employ fuel boost pumps.
In automotive design, especially for high-performance vehicles, the industry is switching to injecting fuel directly into the combustion chamber rather than into the intake tract. This requires much higher injector pressure (i.e., > 10 MPa), since the injector must now fully atomize the fuel and cannot rely on natural atomization during flow down the manifold. Practically this requires a two-stage pump system. The low-pressure side still operates at 300-500 kPa, which is around what we used for manifold injectors at the rail.
There simply is no such thing as a non-pressurized fuel system anymore in a modern hydrocarbon-fueled passenger vehicle. You either have injector inlet pressure being created in the tank with the pump we've been using for decades, or inlet pressure created by boosting fuel delivery pressure in the engine compartment from the standard tank pump to the very high injector pressure.
If a vehicle's ICE engine is running, the notion that it cannot produce jets of flame is absurd.