I remember watching a video on you tube recently and it was about the main item splitting kids today into 'the haves' and 'the have nots' was whether the bank of mum and dad was available to them.
So those kids who got a hand up onto the property ladder and bought something quite quickly had a huge advantage over those kids whose parents (grandparents) could not help them and instead they had to start out renting.
It makes sense. Those renting will face insecurity, unwanted house moves and wasting lots of money on rent as well as battling the awful rental shortage and living in unsuitable places due to lack of supply.
By contrast those helped by mum and dad to buy a property will start off with stability and security and money not wasted on rent can be used to start funding pensions/ISA's earlier. They might be able to bypass flats or starter homes and jump straight into their family or forever home thus saving on moving costs.
Lots of people saying they would let their child stay at home to save as they couldn't help them financially and of course this helps over the poor sods who are on their own having to battle the rental maze. However if prices continue to go up then getting on immediately (due to family money) must be better than having to delay for 5 years while you save up.
People who bought in the eighties and nineties who were 'working class' and had no help could still get on the ladder quite easily even if it was a flat or a starter home. These days are gone for lots of youngsters. When I think how easy it was to buy our first home it is almost laughable. In 1991 living in Guildford, Surrey with then boyfriend we stretched to buy our first house. I remember feeling quite disheartened because with our 2 salaries our choice of houses were a 2 bed ex council house (which we did buy) or a 1 bed quarter house in a private area. I was 19 and he would have been 23 from memory. We bought the ex council house for about £55000. These tiny ex council houses are now selling for £350,000 (wish I still owned it!). Seriously though what hope would two youngsters have now of buying a house there. We had no idea how lucky we were at the time.
Also I went to uni - course paid by Govt. Got a grant as my parents were low earners so managed to survive without working during term time (was very poor tho) but could concentrate on my studies then used to work in all the holidays except easter as right before exams. So I left uni with absolutely no debt, had my accountancy degree, bought a house in Guildford Surrey. I had no idea how lucky i was to be born when i was.
Even daft things like will working class families be able to afford good dental care for their kids when there are no NHS dentists left or will they be at a disadvantage over those with perfect white, straight teeth (paid for by private dentists). Sounds daft but these small items are important in appearance and making the right impression at job interviews.
In short I agree with the OP. I was from a poor family, grew up in a rented council house and no family money at that time to help me.