But in many many parts of the UK it is possible for people on average wages to save for a deposit on a suitable home in a suitable area in a reasonable timescale.
No-ones saying do without everything non essential, just not go for the expensive version every time.
The same could be said when choosing a home. It seems that a lot of FTBs now expect to be able to buy, say, a 3 or 4 bed semi or detached in a desirable area whereas it used to be that we looked at flats or small terraces often without gardens or only a small yard (this is what my first purchase was) in a cheaper area, which is still safe and has access to amenities but I suddenly deemed unsuitable (and yes there are jobs available, there's cities with plenty of large employers including law, finance, tech, public sector etc etc outside the SE).
I've just replaced my phone, because I dropped the old one and the screen broke. It still works but there's large parts of the screen obscured and when I need someone scan a barcode it's a struggle.
I had my old phone nearly 4 years and it cost £150, bought at a discount. I sold the one it replaced, probably for around £50. I pay £7 a month for a sim only service. So I probably average around £10 a month to have a phone.
My new phone cost £165. It's perfectly decent and functional and I can't see why I'd need to pay £40/50/60 a month for a 'better' phone on contract even though I could easily afford to.
That's hundreds of pounds extra a year just for a phone. Likewise cars, far cheaper to start with a nearly new average version, run for a few years compared with leasing a new higher end model, changed every 3 years.
Both get you from A to B in safety and comfort yet the latter will cost hundreds of pounds a month more, which is thousands of pounds a year or tens of thousands a decade.
Repeat for hair, nails, tattoos, botox, eyebrows, gym memberships, lunches, takeaways, eating out etc etc. No need to cut out completely, just cut down for a bit.
Like a recent poster said, if I lived like the 1990s, I'd have loads of money, likewise if people prioritised differently, they'd have loads of money and for many, if absolutely is the difference between saving a house deposit in say 2-3 years and not.
The high cost situation in London/SE is not representative of the country as a whole and its a perfectly achievable goal in large parts of the country. But not at the same time as spending loads of money on non essentials.