You can say no a million times, it doesn't change the facts, anything with moving parts in contact with each other is subject to wear, poor lubrication, insufficient maintenance, user error and environmental conditions can all amplify the rate of that wear and potentially lead to unexpected failure.
To provide maintenance free (or minimal) amounts of maintenance to an open chain system, there is pretty much only two ways to do it, make the chain so over engineered and bulky as to be next to useless to a person powered device (in which case it'll still wear and potentially fail, just possibly take longer) or don't use an open chain system.
There are bikes out there which don't use chains, fitted with belt drive systems etc and guess what, belts still wear and break.
Whatever the system, there is simply no way to ensure complete failure proofing. It's always been a case of "deal with via relatively cheap and available user replacable parts".
To go this way in regards to chains specifically, given my limited engine knowledge isn't there a system of chains in a closed oil filled system, not open to the elements, running in a 'perfect' environment, I'm thinking about the cam chains, they still fail, normally due to wear or other unforeseen incidents, in fact, don't a lot of car manufacturers specify a service interval for them.
IMHO It's a trade off between durability and usability, moving parts wear, there is no practical way round it.