Short answer: No!
Zipp investigated and tested this in early 2023 and are here to answer this question once and for all. We looked at the data, switching to a 30mm tire will cost you 1 watt in aerodynamic efficiency.
From a rolling resistance and vibration loss perspective, you actually gain about 6 watts in rolling efficiency (as measured on our rolling road treadmill).
This means you will save upwards of 5 watts by switching from a 28mm to a 30mm tire on a smooth road. When the road is rough or broken, this benefit continues to grow.