Can you raise a one bid with only two "filler" honors in a suit?
Certainly it's reasonable, whether or not you are a Bergen acolyte. But it ought to be a rare hand where raising with only two trump is more attractive than the alternatives. These situations come up more often in competition. For instance, if the auction started

(1C) 1S (2C)

I would be happy to raise to 2S with something like

AQ
Kxx
xxxxx
xxx


I agree with Pieter that if you have fewer trump than partner expects you ought to be near a maximum in high cards. This point was made many years ago by Edgar Kaplan.