Now, take a look at these hands from MJ3: https://www.reddit.com/r/midjourney/comments/wlujgw/midjourn...
It's important to note that MJ3 reliably did not produce human looking hands.
It's equally important to note that MJ5 usually does, at least from a quick count/survey of the hands shown in the provided image.
Is that sufficient? If not, what proofs would be sufficient?