You are moving the goalposts and supporting your generic point only under very narrow assumed conditions.

There’s always a “right tool for the job”. Sometimes it’s the cloud. Sometimes it isn’t. The article is for people who found the cloud isn’t a good fit and need something at home.

A lot of people have large collections of music or movies. Or want to keep full control over some data no matter the cost. Or need it to work without internet. There are many solid reasons to avoid the cloud and use your own solution.

You are arguing that your original assertion isn’t wrong, people’s stated needs must be wrong. Because you have different needs so others must be doing it wrong. And this undermines everything else you say.