From what I understand, the benefits there aren't necessarily about dosing the intake valves with fuel mist. It's about higher efficiency at lower revs.
It might not make much sense on the surface. But there are lots of good reasons.
www.roadandtrack.com
Jason Fenske of
Engineering Explained breaks it down in his latest video. There are lots of benefits to both methods of fuel injection, and it turns out manufacturers can use either one (or both at the same time) depending on an engine's RPM range for maximum power or efficiency. For example, using port injection means the fuel can cool down the intake air before it reaches the combustion chamber, increasing air density and allowing for more fuel to be used, and therefore more power. Port injection is used at low RPM for better air-fuel mixing, which results in a more stable, efficient combustion.
Direct injection, on the other hand, cools the air inside the cylinder, greatly reducing the probability of knock. This means the engine can advance timing and run more boost before running into issues. Direct injection is used at high RPM to cool the chamber at high loads and create the most power possible.