Nate explained it very well.
Over the past 35 years of training I noticed that those who went wide and did it often ended up with shoulder problems. I have not read any scientific reports to either back that up or refute it.
I never noticed anyone have problems performing the Deadlift or Squat properly. It could be that those are more "natural" movements than a wide grip Pull-up is,
I'm not sure. I only posted mu opinion to save you from future pain. Obviously, you can do whatever makes you happy.