How can any wedding photographer get the shots with the 800?

I haven't missed any shots at weddings or lifestyle sessions with the D800.  I have no clue what you're talking about....but I'm going to guess you don't own a D800 and instead are just repeating what:

1) Others who don't own a D800 are saying....or....

2) People who have never been able to learn how to use AF in the first place.

In most situations, the D800 focuses better than my D700.