You've asked me that question before. I'll reply again: I don't have a contract with my landlord at all. Very unusual but there we are. Further, subletting in English law is not when you let someone use a room in a property you let.
I really take issue with your point that it's always been hard to buy, as if things have some how remained static. 20 years ago in London, you could buy a house for 50k. Average salaries were around 10-15k. Now the average house price is pushing 500k and the average salary is 30k. You don't need to be a mathematician to see the numbers used to add up and no longer do. Nor do you need to be intelligent to see that this situation favoured people of a certain age. The reason I was driven to Airbnb was actually because of a motorbike accident (I was not at fault) and I suddenly needed close to a grand for repairs. Guess what... yep I didn't have even a grand saved up.
I've never said homeowners don't work hard. I'm simply pointing out that when you earn 2k a month after tax (in a good job apparently!) and 1.4k is already gone solely on rent, before adding a travel card at £130, utilities, food and council tax... there is not much left and certainly not enough to start any significant savings towards a 70k deposit. Nevermind the fact that those house prices are constantly increasing and therefore the deposit is getting ever larger. The person I rent from bought their place in 1990. They don't even have a mortgage anymore.
This is a major issue that can't be dismissed by saying : oh it was always hard. Frankly I am very worried about what will happen in my old age, when I have no savings and no home, despite being university educated with an MA in Political Science and being in constant employment since graduation.
If you can't see things are desperate out there for those of us who haven't made it yet, god help us. Not that it's your issue, it's the next generation who will have to deal with an even worse lack of housing plus supporting a generation who never made it and are then dumped on the social system. Bleak times ahead and I wish I was exaggerating. This is why I don't have an issue with renters trying to improve their situation through homesharing, but get really frustrated when I see property owners hijacking Airbnb and dumping huge portfolios on there because they can make even more than the already inflated rents available to locals.
But hey, there's always winners and losers right? And it's totally ok that people who want to stand on their own two feet can't, right? They must have not worked hard enough so they deserve it!
This sort of thinking is dangerous because it allows us to paper over deep divisions in society.
Like I already stated, I know my position in unpopular as I'm coming at this from a totally different perspective from 99% of people on this forum, but in my opinion It's really time to start recognising the challenges people may be facing (not just nodding when there's a news article about how messed up things are). These challenges are what drives people to seek solutions to a problem. Airbnb arose from the founders trying to make their rent. Trust me I'd rather not have to sleep on the living room floor either but these are the cards I've been dealt, and fear of what the future holds drives me to make sacrifices. I'm not doing this to be greedy. I literally don't have a choice.