Sure I'll tell why. First of all the article in the OP #1 was about people with Cameras getting in the way of the Photographer and posting their pics on Social Media, sometimes before the Paid Photographer had a chance to post his/hers.
I have yet to see a pro photographer who wasn't the pushiest person in the room...If this is an ongoing problem then maybe a change of job is in order and again if you have that many people who have that many quality pics that the photographer is concerned then why did you hire the photographer anyway?
Now on to your question. At an event, there could be a Paid Professional Photographer as well as others who are not hired/contracted, also taking pictures. Remember, the Photographer is already paid so the Fee goes to that one person. There can be numerous people with their cameras along with the Paid Professional Photographer. It is also a known fact that there could be more than one Paid Photographer at a Event and as professionals they usually don't get in each other's way.
Now to the Professional DJ & iPod Guy. At an Event, it is usually one or the other performing. I don't know about you all but I have never seen someone with an iPod playing Music and getting in the way of a Paid DJ while he is performing. This is why I said that they are not one and the same. (Direct answer to your question)
I think you missed the point on that one what I'm trying to say is all vendors have technological obstacles to overcome it's a new world. Some DJ's feel they compete with the Ipod wedding thing same as some photographers feel they compete with the point and click folks...The pro's in both cases rise to the top
As a footnote. There are actual DJs who do use Ipods and still charge a Professional Fee. Some even reside on this Forum.
Now if you want me to explain what I posted in #27, here it is. Additional photos by the Wedding Photographer are usually sold to the Client and their Guests. It used to be that those were the only quality shots available so people placed orders with the Professional Photographer. However, with others posting their own pics on Social Media and Photo Posting sites for free, there is no initiative for Guests to order additional shots for their own use from the Professional Photographer. This is where the "No Competition" phrase comes in. Why pay for something one can get for free.
So basically the photographer can't gouge the client anymore so they are upset....My heart is broken. Once again if the client is satisfied with the pics that get compressed and posted on Facebook what is the photographer doing wrong?
When I give someone a quote and they tell me they have someone who can do it for free, my response usually is "I can't compete with free". If the prospect wants to go with that person instead of me, then so be it. That does not mean to say that their event may be ruined. However as History serves us, we know all to well how most of those arrangements turn out.