Fox doesn’t have many conservatives left on there at all to listen to. Run down the list of radio hosts and you can find more than enough to listen to on any given day that are far more conservative than anyone on Fox. The only people still giving Fox an audience will be people who are not savvy enough to search out content that requires more than clicking the remote control.
you’re certainly making a lot of assumptions about many millions of people based on absolutely no knowledge of them at all.