Bill is right on it.
GOOD guitar players adapt to anything. Excuses don't cut the mustard.
^ Saying you personally don't buy guitars perfect for you is NOT a counterargument to the fact that improvement comes from continual adaption - as medically proved via sports science. If you limit yourself, then you never break out of a comfort zone.
Its exactly the same with any physical activity or skill.....
If you're expecting an acoustic to play like an electric, you're expecting way too much. Typically, they have thicker strings and higher action. Unless you talking about Pre-WWI or Civil War era Archtop Martins, I doubt the radius was that rounded.
Playing acoustic is like learning how to play guitar all over again. I use light gauge strings on my Martin, which are thick strings compared to a Fender/Gibson (.012 to .054). So its harder to play regardless of a fretboard radius. Also, the nutwidth is typically wider too; usually this helps with fingerstyle playing and hard strumming while retaining string/note separation.
Hmm
My Hummingbird has a short scale 24.75
And extra light strings 47-10
Action set just a over buzzing
And by gosh, if it weren't for the thicker body it would be just lime my Les Paul
The twelves that came on the durned thing were huge
And it was much much louder with them
But yeah the decision to buy it when I have a Martin
Was because of the scale and ease of play