Precise computer controlled metering and delivery of fuel under extreme pressure and spark at the optimum moment versus "dumping a bunch of fuel" and hoping it mixes adequately while making it's way through an intake manifold, then past a single valve and into the combustion chamber where the spark will hopefully arrive at the right time based on a static setting and some mechanical advance.
Wow this really simplified it for me and this hit me and yeah I realize that there is a lot more that goes into it than even what you said thanks for this I also wonder what a 4v LA head would be like haha