we all have different relationships with our parents and families and it doesn't do to assume everyone feels the same about their relatives.
perhaps at the age of 60 it was a case of now or never. why do you consider it self indulgent?? none of us know anything about their background or what's gone on in their family so we really ought not to judge them. we all only get one shot at life and have to live it the way we see fit. if these two people have the sort of relationship with their elderly father that they would even consider leaving him for however long it should have taken for their trip, then they did the right thing. i have a great relationship with my sons but if there came a point when they were considering something like this if i live to be 90, then i would say good luck to them.
raised some hackles? i don't think so, just opened up a debate.