Yep, that's pretty much the response I've had from everyone I've discussed this with. I agree there are possibly such valid reasons as "Well, I run a podcast and....." or possibly "TBH, I have a dark side, and I enjoy Trolling people now and again." but my counterargument is that we already have the ability to create Communities that are perfectly capable of providing a separate experience to an individual's main account; that's certainly what I do with my "Seriously?" community even if nobody wants to join it. LOL.
With that view in mind, the only reason that I can think of for having two or more accounts is to multiply one's curation/posting rewards; it's a bit like the lottery "The more tickets you buy, the more chance you have of winning!" and I have not even included all the other crooked activities people use multiple accounts for.
Maybe double dipping on posting rewards as an author but multiaccounting and trying to maximize curation rewards is not adding efficiency. You still get the same amount of rewards for the same staked hp for both curation activities so better just put the value into one account. Unless the other account is just dedicated for a set of different people.