Carve out twenty minutes to listen to it again. They specifically address your points, such as whether gold "just made it" or whether it was "destined to make it as the only good choice". They come down on the latter conclusion.
Diamonds aren't malleable nor (easily) divisible nor can they be recombined.
There are lots and lots of characteristics that make a good commodity store of value. Gold has a heck of a lot of them, not just one or two.
No, there are not a lot of other really great substances we could have chosen.
But you are right about one thing, we didn't choose gold for the industrial properties, unless you count the making of jewelry.