:bsflag:
Just like every other muscle in the body, fingers can be strengthened.
I play on 12s in standard and bend when, where and as fara as I want to, including at the 1st fret where even most players with 9s wimp out.:friday:
And the wound Gs in most sets are equivalent in tension to the somewhat smaller but larger cored plain string that is more commonplace on today`s sets designed for players with inferior hand strength. The only reason that a plain g was introduced in the first place was because the technology wasn´t there to make the core small enough to use a wound string. Any assumption that a wound G is harder to bend than a plain string at the same tension has no root in reality or physics.
Sorry to put it that bluntly, but Les Paul, Django Reinhardt, Charlie Christian, Robert Johnson and MANY others had no problems with 11s, 12s or 13s, all with wound g strings, and it was all they had back then. There were no 10s, 9s or 8s. At all. Lighter gauges didn´t come into existence until the late 60s or so when people started wanting to play faster and faster while investing less time to practicing anfd finger strength.... The pinnacle of this evolution came about 15 years later with hair, shred and speed metal, and thankfully the whole "you need light strings to be able to bend and play fast" schtick has been steadily dying ever since.
Technology can make the symptoms of less practice less apparent, but only practice will remove the cause.