maybe it is. but i think there's worse things someone could do to generate a private key than rolling a dice.
There are obviously worse habits when generating a wallet. We're trying to minimize the risks.
like using a computer connected to the internet and generating it right off a live website such as bitaddress
That definitely inherits some risks. But, if you've verified the authenticity of bitaddress on a transparent operating system, which works air-gapped, you've minimized the risks.
not every bitcoin private key has exactly 2 hex characters of each digit...so for most private keys there is going to be one hex character at least one that appears more than the others. whether that came about through a biased dice or a random number generator on a computer, you would have no way of knowing.
What does this have to do with
anything? A private key in which one character appears more than once doesn't make it less secure than one which doesn't.