No need. If that sequence is not random, quantum mechanics is in big trouble.

You're not sampling the signal directly on the transistor. There are lots of places where the randomness could be biased.

Random does not mean uniform and unbiased. A coin that lands heads up 99.99% of the time is still random, but not terribly useful without some postprocessing.

just because binary data is "random" doesn't mean it yields independent, identically-distributed random variables --- whatever the source.