Moderation is not only about voting. The titles of submissions are regularly edited, for example to add year numbers to add context when an article was published.
Of course such edits could be stored in new blocks with the information to replace the title of previous blocks. However, it would not be possible to delete any content.
So you answered your own question... just don't look at the blocks that are marked as "outdated/spam/etc" if you don't want to (but history would still be preserved)
I did not ask any question, I stated a fact. But yes, history will be preserved. However, the point of moderation is also to delete inappropriate content, not only hide it.
