A lot of hardware to manage. Expensive is correct. And some churches (pastors and priests) don’t like cameras. Some don’t allow cameras at all. And then fighting with the wedding party and families.
The ROI might be difficult and the hassle not worth it.
I learned firsthand about churches and cameras. The one I got married in permits them but NO flash.
Once upon a time having a video production setup to do multicamera was worth it. I can’t see it now, especially with all of the smart phones.