I think you're being downvoted because you're not sincere in the question. As you say, you already hold the position; you could make the argument yourself. The

I think you're being downvoted because you're not sincere in the question. As you say, you already hold the position; you could make the argument yourself. The problem with devil's advocacy is that it can be a time-waster. One can play devil's advocate forever on any nontrivial issue. There is no point at which you have to concede the argument. If you suspect that the advocate isn't being sincere, many people will object to the potential time sink. Effectively, you've proposed a game, and nobody wants to play. The downvotes indicate that others wish to avoid the potential threadjack. To put it another way: they don't believe that it can be substantive discussion, at least not in this forum. There are reddit forums where you'll find people better qualified to present the position opposite yours.