Wow, that "history" is so painfully wrong. The FCC didn't lobby to get involved in radio, nor did it somehow add the licensing requirement after it was granted regulatory authority over radio.
Licenses that could be denied for radio was a policy adopted by Congress in the same law that created the Federal Radio Commission, before the FCC existed. The FCC inherited its radio role from the Federal Radio Commission. Neither the FCC, nor its predecessor, could have lobbied for the power to grant and deny licenses, because they didn't exist when Congress was considering creating that power.
Licenses that could be denied for radio was a policy adopted by Congress in the same law that created the Federal Radio Commission, before the FCC existed. The FCC inherited its radio role from the Federal Radio Commission. Neither the FCC, nor its predecessor, could have lobbied for the power to grant and deny licenses, because they didn't exist when Congress was considering creating that power.