The caution around biased dice is really overblown. :

First, the randomness from your dice rolls is combined with the randomness from your device.  It's purely additional safety, not a single source of failure.

Second, a bias can be detected by the human eye after enough repetition.  The greater the bias, the more obvious the detection becomes.

Third, you can circumvent the bias on the dice with your own additional human randomness.  After every other dice roll, you can invert the dice and record the opposite result instead.