Because blind pick is actually shit for anyone the ONLY reason it is the most played is because its faster to get into queue. If everyone played Normal Draft, queues one the smaller regions woudln't be shit.
oSEXYPLATYPUSo1 voteshttp://na.leagueoflegends.com/en/news/game-updates/competitive/how-rank-2017-season
Normal Draft will be retired at the start of preseason for all regions except North America, Europe West, and Brazil. Our goal is to offer the fewest number of queues that give unique experiences (so we can keep queues healthy) while keeping disruption low, and in all regions except NA/EUW/BR, normal draft had very low participation. In an ideal world, we’d like to retire normal draft in all regions.
oSEXYPLATYPUSo1 votesthose regions in which it is being removed
in all regions except NA/EUW/BR, normal draft had very low participation
Guy Fox Teemo1 votesthey had low participation wait because the regions were small and people didn't want to wait teh extra few mins it would take since queues would be long since its split in two.
If it was just normal draft (Which everyone thinks is better), they wouldn't have super long queues, and a much better queue then the shit that is blind pick.