SOAP,
you are entitled to harbour a personal dislike of the leisure travel sector if you wish
Yet again you presume too much - I said nothing of the sort.
Far more knowledgeable people than I have identified bigger economic & employment benefits from an expanded LHR than any of the alternatives. Holiday makers, whilst spending a little in the UK on their holiday, spend most of it abroad - and none of it benefits UK exports. None of the airlines you mention carry export goods. And no, SLF don't count.