A famous guest appearing the week their film opens is not a coincidence of scheduling. The booking is the result of a negotiation in which both sides are trading something specific.
Neither side pays the other
Guests are generally not paid meaningful fees for appearances, and studios do not buy the segments. The exchange is promotion for content.
The show receives a name that draws viewers; the guest receives several minutes in front of an audience at the precise moment they need attention.
Because no money moves, the negotiation is over terms other than price: timing, segment length, what will be discussed and what will be shown.
Exclusivity is the scarce commodity
Publicists manage a limited supply of appearances and will not send a client to competing shows in the same window, which makes each booking exclusive by default.
Shows compete for the first appearance after a notable event, since that segment is the one that circulates afterward.
The competition is why a booking can be locked months ahead, well before anyone knows what the guest will actually have to discuss.
Clips are the real product
A segment's value to both parties now lies largely in how it performs online after broadcast, where it reaches far more people than the original airing.
Shows design segments with that in mind, building games and bits that travel as standalone videos rather than depending on the conversation around them.
A guest agrees to those bits because the resulting clip promotes their project to an audience that would never watch the full program.
Questions are prepared but not scripted
Producers speak with a guest beforehand to identify stories worth telling and topics to avoid, which is how anecdotes arrive fully formed.
The host generally receives notes rather than a script, leaving room for genuine exchange within an agreed boundary.
Guests who decline all preparation tend to give looser interviews, which some hosts prefer and most bookers do not.
Relationships outlast any single booking
Publicists represent many clients, and a show that handles one guest badly may find the whole roster unavailable afterward.
That long-term dependency enforces a degree of restraint, since a difficult interview costs the show access it needs repeatedly.
It is also why genuinely adversarial celebrity interviews are rare on programs that depend on a steady supply of bookings.