Its not quite correct because there are hands in that range that have less than 50% equity against the villians hand, jsut like spoonitnow pointed out. You have to play hands that have more than 50% equity against villian's range. The 3betting range depends on the villian's fold to 3bet in btn. The higher this statistic is, the more hands you have to 3bet, because you have higher FE, but you have to be more careful when you do get called or 4betted.