Not to add to argument here but if you are active in this forum and check out a lot of the gambling threads then you know DarkStar and SyGambler are a few of those who are 100% in +EV. And that means clear profit.
Nope. Most of the bets I make are theoretically -EV and usually for fun now. Occasionally I find some +EV opportunities on FreeBitco.in or from promotions on sportsbooks and that's about it.
Being 100% in +EV doesn't mean clear profit either, it means that you're theoretically expected to profit in the long run. Variance can causes losses.