Yeah I'm not convinced that just burying the stuff deep in a hole will do what I think is responsible. That shit stays dangerous for multiple thousands of years. That's such a long timeframe that we cannot predict what's going to happen to our society. It is very realistic that we lose the knowledge of the location or even the dangerousness of that stuff. Imagine future people stumbling into this and actually getting something like a curse from an old pharao by weird invisible forces that make you sick.

Another thing about this is that locations that are "good" candidates for this kind of storage are extremely rare. Germany has been looking for a suitable place for the last few decades and didn't find any yet afaik. And the few places we might have are booked to be filled with all the old waste still sitting in intermediary storage.

Unless we have a reliable way of finding suitable storage places before we start producing more waste it will put us in the same situation we are in now, just worse.