FWIW, I think there's a common misconception that the Green Monster creates most of Fenway's doubles, but I'm not so sure about that. If you look at the
park factors, LHB 2B is considerably higher than RHB 2B. I think it's the expansive RF and its short (in height) wall that creates more doubles than the GM. Well, I'm sure some opposing fielders probably have a tough time with the GM, but I think experienced fielders are more likely to turn balls hit off the GM into singles rather than doubles.
And other than Baker Bowl's close high wall in RF, which I would expect would create a lot of LHB HRs from what would be long flies in other parks (and the PFs show that), and its somewhat deep CF, which would create some doubles (and triples), its dimensions aren't that off from today's average. The whole left side is either fairly average or shorter than average in distance. That said, that short (in height) left field wall would probably create a lot of automatic doubles like the OP pointed out Fenway gets.
Anyway, I'm not saying the PFs are wrong or right. I don't know, I'm just pointing out that I don't think it's so much the wall the creates the doubles, that it's more likely the opposite field that does.