I still think LF is an easier position to play "passably" than first base, especially given Hanley's speed which, theoretically, should allow him to mitigate his errors in misjudgment. Hell, the Yankees put Yogi Berra in LF in his late 30s, after a dozen years of squatting, and Yogi was 5' 7".
You have to go back before 1973 to see some really bad first baseman -- the DH has allowed MLB to hide the real stiffs. I was just a kid, at the time, but I still remember Dick Stuart, aka, "Dr. Strangeglove" trying to play 1st. In two seasons with the Sox, he made 53 errors. And that doesn't include all the popups that he never got a glove on.
btw, I found the Hanely quote about not wanting to play first. I was wrong, he didn't say he was averse to "stretching," it was "bending" that he wanted no part of.
http://fullcount.weei.com/sports/boston/baseball/red-sox/2015/06/10/hanley-ramirez-has-no-intention-of-ever-returning-to-infield/