Comments like that make you sound like a complete tosser. It is possible that the crew got a false deviation of the loc by an aircraft crossing the runway.
What they do at SFO you will not find in any FCOM as being a visual approach. It is an ILS approach with the traffic separation handed back to the crew.
LHR and DXB are the busiest 2 runway airports in the world, and they can achieve all their movements without the use of visual approach’s. Those airports also have a higher seat count per movement which is an indicator of the wake separation required.
If CX had complied with their initial instructions there would never have been a need for a visual approach, end of story.