The issue with several of those isn't really a case of trusting him but of protecting him from other untrustworthy people.
The stuff in the house fine. At 6 dd was putting dirty clothes in hamper, emptying washing machine, taking dirty dishes into kitchen, laying table, dusting, tidying own room, bathing alone (but we've always been in flats so I was on same floor and often in next room chatting away to her) fetching herself snacks and drinks. If you AS'd me you'd see that I've often discussed her being independent and more practical/capable than many of her peers who HAVE been wrapped in cotton wool (I'm talking 16 year olds not allowed to use a kettle!)
BUT He IS too young to use a public Loo alone (there's been several well publicised sexual assaults on children in public loos
www.thecourier.co.uk/fp/news/local/fife/819644/mum-of-supermarket-toilet-sex-assault-victim-warns-freed-attacker-could-strike-again/
www.mirror.co.uk/news/uk-news/girl-8-sexually-assaulted-restaurant-13786261
Same goes for the park, plus the road plus if he hurt himself falling off equipment etc
"You are missing a hefty does of reality." Totally agree.
The reason there's few examples of these horrific assaults happening to younger children is BECAUSE MOST parents DO accompany them!
"I have been educating him from a very young age about consent and his body. He is aware that he cannot engage with others" so if he ever is assaulted he'll think it was his fault for "engaging"? do you think everyone who's been sexually assaulted by anyone they so much as smiled at or said hello to is at fault? Even 6 year olds?!
Instinctive response to a threat is fight, flight or freeze and you don't know which yours is until threatened.
Mine is to fight - not always wise as I'm a 5'2" dumpy middle aged woman and at times I've fought and in hindsight it was a poor decision that paid off in sheer luck, however it worked to a degree with my abusive father which is possibly how it became entrenched.
Dds is flight - again not always advisable I had to work hard to counter her doing it when the smoke alarm went off (there weren't fires it was burnt toast type situations) but she didn't know that and if she were to run/hide in a real fire that could have been dangerous.
I've known people who "freeze" too inc when sexually assaulted, sometimes it's worked as some freaks get off on screaming etc but again it can be detrimental.
It's extremely difficult to ignore/train out instinctive reactions.
I did impress upon dd that she was ALLOWED to scream/shout/swear/bite/kick if someone was hurting her/a threat to her. But at the age of 18 having experienced the usual crap of leering boys and men and males who have tried to be worse and she still tends more to flight - removing herself from the situation. On one occasion she did end up having to wrestle away, thankfully he was very drunk and it was in a club so bouncer stepped in too.
Onlyfools - I've seen that video and similar before. Terrifying.
Though "Stranger danger" is now widely acknowledged by experts in child abuse as having been a poorly thought out and implemented campaign that has likely done more harm than good for a number of reasons. Most abusers are known and known well to the child, many parents don't explain what a stranger is and they certainly don't explain that someone who means them harm could well be young, friendly, charming even good looking, that simply knowing someone's name or them knowing your name (I cringe when I see parents advertising their kids names to all and sundry on t-shirts, car stickers etc) doesn't mean they're no longer a stranger etc etc
Op your risk assessment abilities are skewed.