You’re not wrong that the storage itself is undoubtedly more robust on any cloud provider than a cheap consumer NAS box.

However, there are other factors to consider.

A NAS or any storage solution is only useful if you can access it if you need and if the network speed and stability match your expectations.

A cloud solution will be inaccessible if your internet is down. It may also suffer tremendously if your connection is unstable or slow.

In that sense, even a laptop’s drive connected to your switch could prove more robust than any cloud solution.