The current assumption with the surge in COVID-19 cases, and breakthrough infections among the vaccinated, is that the Omicron variant is more infectious. Is that truly the case or are there other factors at work?

As you suspected, this is being disseminated more aggressively by the interlopers to increase the case numbers and to override the immune status generated by the vaccine program. That is why all these breakthrough cases are mounting along with the widespread surge, the interlopers are simply ramping things up to create greater fear and drive the vaccine program forward. They have the government under manipulation so no reason and logic will intercede here, the government will push vaccination no matter what happens, no matter what contraindications or lack of effectiveness might be suspected, so the Extraterrestrial Alliance continues to be in charge.