She didn’t say ‘what do you do?’ in a patronising way at all
But she did. Because to those of us who live in and around the other large cities in the UK our lives are very similar to the people who live in London and we don't see such a great difference at all. Especially not one that makes us feel like we're missing out, or to anyone on all except the very highest incomes feel like it's worth the trade off in paying higher housing costs to live there.
So her wide eyed 'we have so much to see and do what is life like if we don't have all these exact same things' very much implies that she thinks she'll struggle to find interesting things to do, see and eat if she moved to Not London.
Granted, it's not exactly the same because no too places are, and of course we don't get to walk past the House of Parliament any time we like but there's certainly more than enough of interest to keep the average family entertained.
But in any case, I don't believe for one minute that the average family who lives in or close to central London spends all their leisure time here there and everywhere, out at a gallery every night, and goes to a national museum and royal park every weekend and even if they did, you can have a similar lifestyle.
And while the tube is marvellous and I agree that public transport is generally far superior in London, because of the inequality in investment, it's not that fast a lot of the time and unless you live very close to somewhere, it's still 30-60 minutes away, and if you look at what someone who lives in and around somewhere like Leeds or Manchester has within 30-60 minutes, you do have a variety of world class museums, galleries, parks and other attractions where you could keep even the most discerning family perpetually entertained for as much or as little money as you like
Free national museums (armouries, railway, media, mining), countless smaller museums, so many large parks and gardens, with petting zoos etc, world heritage sites, eg Saltaire including David Hockney galleries, Yorkshire Sculpture Park, Barbara Hepworth gallery, loads of smaller galleries Haworth and all the Bronte stuff, which is so popular with Japanese tourists, that the route to Top Withins is signposted in Japanese, endless other little villages of interest with nice independent cafes and delis, massive vibrant street food scene, huge variety of restaurants that regularly feature in the national press etc etc etc, plus all the stunning upland wilderness accessible in under half an hour which is just not accessible in London.