For air talent in all formats, there's a million different types of show prep. Some good, some bad. Most of it is essential for a topical show and I fully recommend having access to as much show prep as possible.
But you should try an experiment.
If all the show prep you have available to you (including the Internet) were to go away, would you still be able to do an entertaining show? Do you have enough of a life outside of radio to be relatable and entertaining with your own experiences? Or as talent coach Tommy Kramer calls it, "your own camera angle?"
Show prep sites and services are really important, but don't let that be the only thing on your show. We all have access to the same Celebrity Birthday's and Hollywood Gossip. Bring your own personal stories, experiences and relatables to your show.
Talk about things that only YOU have, not what everyone else is talking about.