Bloody tragic IMO. That this person doesn't have anybody to care for him.
He clearly does have someone caring for him or the OP wouldn't have posted the thread.
Full time care sounds like the right thing to do for lots of folks until you realise what it involves.
Would you really want someone living in your house 24/7 watching your every move?
Even worse being taken out of your home and forced to live with people you don't know and might not even like?
There are loads of good posts on this thread that might give the OP ideas on how to let this guy live in his own home, living his own life safely.
A common solution, which may already have been mentioned, is to have a fire detection system connected to an auto-dialer that phones the carer and alerts them.
there are also systems where you can work out when and where someone is moving around there home.
This means you can easily see patterns forming in behaviour and have someone nearby or present at those times.
Something as simple as a help call system which dials 3 numbers in list of priority can make all the difference.
In short I can see why people might think 24/7 care is the answer but most of the time it can be avoided.