Not my point though. Use case for over the air update is when one has no access to the device or its debug interfaces. So, the implementation must provide for a way to remotely handle entering programming mode, etc. IMO, the disclaimer section should be a part of the implementation.
You're entitled to your opinion.
My opinion is that if you read the page, which is only like 10 paragraphs anyway, you can clearly see how it works and decide for yourself if it's useful for you.