There are two possible approaches here, aren’t there?
- Sorry, but there isn’t any. It’s horrible and should be banned.
- The 3:2 frame, like frames of other proportions, needs no defense. It’s just a simple rectangular*, of a certain shape. Now move on, nothing to see here.
Personally I should force myself to commit to #2, no later than now. Have spent way too much energy already on disliking 3:2.
*Perhaps what we should be asking is why rectangular?