DC prompt is closer to you so you lose less speed. The less speed you have to regain through acceleration the better.

Also it's not technically obligatory since you can skip it with some really jank methods but taking it somewhere is way faster.

This is not the only reason. Take a look at these 2 clips : (25m50s) (18m12s)

Notice anything ? I believe this saves about 2-3 seconds total.