That may have been me that said that, since it is the case. I used to play a Bb or B or C using an A form barred up, by barring with the first finger and getting the 2nd, 3rd and 4th strings two frets higher with the little finger, bending it back to miss the first. There is some arthritis now in that one joint of that one finger, and I can't do that anymore, although the finger still works ok for "normal" use in fingering chords.

Keep in mind - it took 30 years of using that chord formation for the problem to develop. So whether to do it or not may depend on how old you are now....

Doesn't seem like you'd need to do anything like that for that G chord formation, anyway. I just use four fingers and it works fine. And you have more options for quick changes.

Peter.