why not tap onto/over the leak and divert it to the surface where the product can be separated and loaded onto tankers
why not:
1. divert the flow to the surface
2.separted the mud, water , gasses, usable product
They were doing both, but can't do the "pump and capture" while the "top kill" attempt is being made. If the "top kill" fails, they will go back to (and probably expand) the "pump and capture" process while waiting for the relief wells to be completed.