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Yes, first of all - for that reason.
Also it allows to save on RC, not to waste it left and right, when it is not absolutely necessary.
If I want to honor somebody with my 100% voting power of LEO tokens, I do not have now to make a 100% voting from my main steem acct, and waste my VP and RC.
In a few words - much more flexibility (what I want and what I can do)

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