Most production companies will quote you for a Sunday service the same way they quote a conference with hymns in it. That gets you a crew who arrive at nine, point three cameras at a stage, and leave. It works once. It is the wrong shape for worship, and the differences are structural rather than cosmetic.
A conference happens once. A service happens every week, at the same hour, whether or not the person who understands the mixer turned up that morning. Anything you build has to survive that — which means the question is never just "can you stream this Sunday", it is "what will this look like on the fortieth Sunday, run by whoever is available".
There is no second take. A wedding photographer can ask for the ring exchange again. Nobody asks a priest to repeat the consecration, or a khateeb to restart the khutbah, because a camera operator missed it. Every camera we run records locally to its own card at the same time as it feeds the switcher, so a dropped network costs you the live feed at worst and never the recording.
The congregation in the room outranks the stream. A tripod in the aisle, a cable across a doorway, an operator standing where a family has sat for thirty years — those are real costs, and they are the reason worship AV is a discipline rather than an event-production sideline. We plan camera positions around sightlines and movement before we plan them around framing.
And most of it is run by volunteers. The best system is not the one with the most inputs; it is the one a seventeen-year-old can start correctly at 6:40am on a Sunday when the person who normally does it is away. That constraint shapes everything we install and everything we teach.