de0u a backup is not a backup until it has/can be(en) restored.
I'll give you the notion if you have resources and time to test it in another profile immediately upon creation, and once verified it's guaranteed to always be restorable, fine. But that's a lot of involved work.
If it's a tossup each time you restore, it's the same or worse as "well it works maybe 25% of time maybe it do maybe it don't just try a couple times"
I got better things to do with my time & wonder if trading a little privacy for reliable Google backup known to be verifiably encrypted and secured via 3rd party audit isn't the worst thing ever