Originally Posted by: ScottF2022Why are so many versions of G taught?[/quote]

2 reasons.

1. There are many different levels of student ability, from absolute beginner, to intermediate, to advanced. Each student has their own particular set of problems when learning guitar. Some students breeze right through simple chords, some struggle for a while. Some breeze right through basic open chords, some struggle. Same for barre chords, inversions, extended harmony chords, etc.

Different options for different students.

2. There are many possible ways to voice any given chord on the guitar. It's good to get used to that idea as soon as possible.

[quote=ScottF2022]

Shouldn't we learn just one version and get really good at it?

If you only ever intend to play one voicing & it works for your musical goals, then that's absolutely fine. And yes, you should get really good at however many you will find practical to know & use.

Hope that helps!