Yeah you just don't ask do you? It is sold as seen pretty much. (Caveat Emptor.)
It never ceases to amaze me though, how much stuff is not picked up by the survey! What's the fecking point in having one/paying for one?! 
Every house me and DH have ever bought since the early 1990s - 5 in all - has had to have multiple 1000s of pounds spent on it - on fixing stuff that was not revealed/not apparent when we bought it. 3 houses have had to have the shitty boiler replaced - one had to have the entire heating system replaced. Then there was hidden damp, rotting window frames, faulty electrics, a knackered roof, kitchen cupboards loose and rotten that needed replacing, a leaking garage roof that needed replacing! Plus lots more! The survey(s) never picked any of this up. 
Why?!
I know several couples right now who have bought a house in the last 2 years, one is a family member and their spouse. Bought what looked like a shiny well-maintained 4 bed detached, built in the late 1980s. (It looked good aesthetically,) and yet it's had issue after issue. The windows needed replacing, and so did the front door, and also the bathroom.
They also discovered the one wall that has a raised driveway at the side of it/against the kitchen-diner wall, is riddled with damp. Just cost them £5,000 to fix it. And the builder said there's no guarantee the damp won't return, because of the raised driveway that is attached to the house. Stupid bloody design!
Then someone 2 streets away from me (3 minute walk,) bought a large 4 bed 1930s detached cottage for £659,000 in May this year. There was a woman living there who had been there since the mid 1960s. (With her husband for the first 50 years, then he died in 2015 and she was alone after that.) She moved in with her son 100 miles away 6 months ago.
The couple discovered, several weeks after completion, that the roof needed fixing. Around 40% of it was rotten, and the other 60% was on its way out/not great. The rain poured in through the roof, and 2 of the bedrooms ceilings. In this case, she must have know this, and yet never disclosed it. They have just had to fork out £23,000 for a new roof. There are other horrors they have discovered that are going to cost them a further £20,000 to £25,000 to fix.
I also know a third couple - with 2 kids - who bought a 3 bed semi last October 2022, and discovered almost immediately that the boiler was fucked. Had to fork out £2,500 for a new one within several weeks of moving in. Also, the fence was falling apart, and next door had 3 big dogs, and they had 2 small children, so they had to fork out nearly £1000 for that. Then some weeks after, they discovered the electrics were faulty. They have also discovered hidden damp!
I have met anyone who bought a house off someone, and didn't need to spend 1000s of pounds on it for stuff that is faulty/knackered/beyond repair. And they were things that never came up on the survey! It's a bit shit, but as someone said, it happens to everyone.
You really do need to have a big fat pot of savings - £25,000 or so - when you buy a house from someone else, as there is always a shit load of stuff wrong!
But yeah, you can't ask the seller for the money! (Not in England - and Wales presumably.)