Although Emert's transformed Hades form does cause further cards to be exiled instead of getting re-used again in the graveyard, there are plenty of ways to avoid the downside while still reaping the rewards
I tend to play these when I am land heavy and want to safely reduce my land count where as I tend to play the bounce lands when I feel I am light and need to give my land count a boost

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(Choose any number of permanents and/or players, then give each another counter of each kind already there.) Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) : Proliferate