if it is safe for an untrained individual to do so.

Remove this part and I agree. If you don’t know how to repair it yourself, you can always go to an independent repair shop. But if manufacturers don’t have to make parts available, you are at the mercy of the manufacturer.

So make the parts available and publish schematics, and those who want to can attempt the repair themselves, and those who don’t can take it to a repair shop.

Manufacturers use the “but it’s dangerous!” excuse to lock people into their ecosystem and/or support planned obsolescence. That needs to end.