If they had a problem configuring, they would have aborted the approach.
If they knew in advance, they never would have been allowed to land at DXB.
B
T!
If the captain of an aircraft has an in-flight emergency and decides that an airport is the most appropriate place to go to, he will go there. The airport authorities don't get a say in the matter, even though they may wish he went to the next airport. Subsequent disruption is not a factor in deciding where to go.