You can say you disagree with the choice, can't say he doesn't qualify. He played test cricket.
As I said, I select based on who would I trust to put on a pitch today who would succeed. And of course traits / ability.
I'm work for a financial institution and in interviews we more look for behavioral competencies over functional ones. Barry has every single intangible that I'm looking for, and I know he would succeed.
With regards to confidence, it doesn't require any. Including his tests, WSC, and the ROW series he averaged 62.
In non test matches including the best bowlers of his era he averaged 58.
In fc matches vs touring test teams he averaged 75.
You're the contemporary peer ratings guy, in real time from 70 - 76 he was seen as the best bat in the world.
Lillee rates him with Sobers and Viv. Thompson rated him at least the equal of Chappell who he rates as the best in the era. He out both to the sword.
Pollock and Procter both called him the best batsman they've ever seen, Pollock rating him along with Sobers.
He made the Cricinfo 2nd team and the Roar though enough of him to select him in their XI to face the Wisden selections. Crowe also selects him in his second all time team.
An opener with a technique and ability to handle the moving ball who can accelerate an innings? That doesn't exist.
300 runs in a day, 9 hundreds before lunch, who else can do that? Triple hundred off Lillee, McKenzie and Lock, doubles off of Snow and Procter.
I know we have to disagree about everything, but this doesn't call for confidence.
Apologies for the long response.