Actually there is a more apparent technical reasoning that shows the bigger the blocks are the less private Bitcoin is. I researched the various ways of how wallets acquire their balances and it turned out, if the user is not a full node user then at least one third party have already linked together all its addresses.
To be fair I worked a lot on this problem since and we are making improvements [1] [2] [3] [4], but we are not where we should be yet.

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