Funny you say that because I have had at least one station engineer say the opposite to me much to my surprise. Unless they didn't understand the question, which I doubt.
Well, it may be true if an analog channel 2 is replaced by UHF. Even at 1MW ERP, the digital station won't be able to replicate the coverage of the 100kW ERP channel 2 analog station. And that MW probably needs 35 to 90 kW of tranmitter output power, more than would be needed to power the channel 2 analog antenna.