Doesn't this mean there will need to be a dynamically detachable connector between every fuel/gas line and every electrical wire that runs between the tank and

Doesn't this mean there will need to be a dynamically detachable connector between every fuel/gas line and every electrical wire that runs between the tank and the engine? Isn't that introducing quite a few potential points of failure? Or was this all thoroughly solved in the 60s and is boring and not an issue? This happens at lift-off for all rockets. The rockets are fueled at the pad, and the connections stay attached until the last moment. This kind of thing was also done with the Space Shuttle.