I agree with most of what you said, however it isn’t just hoarding in existing bases, I think databases filled with maybe even thousands of player created characters that likely won’t ever be used + general piles of mess in them can also warrant a server wipe.
That said they shouldn’t just wipe servers, but rather have it in a system so that a server will be wiped after X amount of time, but perhaps with a feature to vault your character in your account with all they have learned but without stuff in inventory.
I think that would be healthy not just for server performance and unnecessary hoarding, but also for players generally, official servers shouldn’t be a mausoleum filled with stuff and some that can’t be obtained anymore 
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