I apologize for posting here. I’m just an ignorant bug-smasher flying general aviation private pilot. I have no idea what it’s like to fly real planes for a living so my question may be totally ridiculous. But if I was flying into SFO and there was no ILS or PAPIs and I was assigned the 28L visual, I would load the RNAV 28L approach which has LPV precision guidance and use it as a check to make sure I was doing the right thing on the right runway. Is there some reason why you wouldn’t do the same in a 777? Frankly if given the choice, I'd rather have LPV guidance than PAPI/VASIs.