It should be routine, for everyone.
I think they want the Baby-Boomers to get tested, because of the fact that blood transfusions were not tested for Hep C, until 1992. So, back then, many people caught Hep C that way (and from the other ways, or course)
These days, most HCV cases are from I.V. drug abuse, home-made tattoos and piercings, etc.
Of course, there are off-spring of Baby-Boomers, who do or dont know they have HCV (maternal transmission is 5%), and sexual contact still accounts for 10% of cases, as well.
I agree with you, that everybody should have the antibody test, it is cheap, and easy. Then, if they are positive, the more expensive test can be used