But it IS more efficient!
The reactive power flow only causes losses in the distribution cabling (I^2 R), And the power company will correct large aggregate PFC issues) while real power flow is total loss.
The better sort of small switcher these days has a PFC input stage anyway, but as ever that is not itself 100% efficient (NOTHING is), so from a power efficiency perspective PFC on a small DC supply may or may not be a win (From a power quality perspective it is very much a win, mainly for reduced flat topping).
Regards, Dan.