[Good point.. very true.]
It was always unhealthy that center-left news coverage (daytime) and right-wing commentary (prime time) was concentrated at Fox. By opening up the competition for centrist and right-of-center news coverage and commentary via his exhortations on behalf of OAN and Newsmax, Trump is doing conservatism a huge favor. Fox, however, could see see huge stock price declines as its market share craters. And broadcast media* is bigger than the print side of the business, with a market cap of $16b vs $10b for broadcast.
* The old News Corp conglomerate sold the entertainment side to Disney, and split the print and broadcast divisions out into News Corp and Fox, with both run by the nominally right-wing son, Lachlan.