The first time I heard it announced at a wedding that the guests were not allowed to pull out their phones and take pictures during the ceremony I thought it was crazy. Who doesn't want to take photos of such an incredibly special day? These days we take photos of our lunch or a funny looking leaf or anything else that captures our attention for more than 5 seconds. Who did this couple think they were telling the guests to keep their phones and cameras in their pocket?
And then I starting watching the ceremony unfold and my opinion changed instantly. There were no hands being held up or people standing or arms waving around trying to find the perfect angle. Each guest sat still and was completely focused on the happy couple. I also noticed the video footage was much better. There wasn't a single distraction coming from the audience. All eyes and attention were on the bride and groom.
I knew there were people in attendance who were dying to get a photo of the ceremony and sometimes it can take 4 or 5 weeks to get the photos back from the photographer so as soon as I got home that evening I pulled 10 or 12 screen shots off my video footage and sent those to the couple. They could then forward them to whoever they wished. The advantage of filming in 2K or 4K is that the still images are quite excellent.
So, don't feel badly if you tell your guests to keep leave their phones in their pockets. Not only is 20 minutes away from that device a good thing, having their undivided attention and a distraction-free ceremony is definitely worth it.