No other major sport pauses twice a day for a meal, and cricket's intervals look like an eccentric survival. They persist because several modern interests happen to want the same breaks that tradition already provided.
The breaks came from ordinary daily rhythm
Long-form cricket was originally played by people whose day already contained a midday meal and an afternoon tea, and the match was arranged around that rather than against it.
Matches were social occasions as much as contests, with spectators, hosts and players sharing the same schedule and often the same table.
Nothing about the sport required a pause. The pause required the sport to accommodate it, and the timings were written into the laws once the game was codified.
Daylight is the real constraint
A day's play has to fit between the light available in the morning and the light lost in the evening, which sets a fixed budget of hours.
Splitting that budget into three sessions creates natural units for players, umpires and scorers, and gives everyone a predictable rhythm of work and recovery.
Sessions also became the unit of tactical thinking. Captains talk about winning a session, which is a concept that only exists because the intervals exist.
Groundstaff need the gaps
Intervals are when the pitch is swept, the outfield tidied, damage repaired and the surface reassessed, all of which is difficult to do in short between-overs gaps.
In hot conditions the break also lets covers be moved and watering decisions be made without stopping play at an awkward moment.
Removing the intervals would mean either accepting a worse surface or introducing unscheduled stoppages, which is a strictly worse arrangement for everyone.
Broadcast turned a custom into inventory
A scheduled break of known length is valuable to a broadcaster, because it can be filled with analysis and advertising without interrupting the contest itself.
That is a stronger protection than nostalgia. Formats that lack natural pauses have had to invent them, usually with awkward results and complaints about artificiality.
Cricket had them already, which is one reason the long format survived the arrival of television better than its detractors expected.
The names outlasted the meals
Professional players now eat according to nutrition plans that bear little resemblance to the meal the interval is named after, and often barely eat at all.
The words stayed because the schedule stayed, and spectators still organize their own day around them, which is its own kind of custom.
Shorter formats dropped the meal names and kept a strategic break instead, which shows how much of the original custom was social rather than structural.

