If the distribution non-evenness result is, say, 1000 bits of entropy in every 1024 bits of RNG output, but we save circuitry and have simple auditable RNG then it's worth it. I'm not going to lose sleep over my RSA key having effectively 4000 bits instead of 4096 when it was generated by maximally simple and transparent process. As compared to complicated crypto whitening that everyone thinks "must have".
The bias of unwhitened output of almost any TRNG is hugely biased. For almost anything based on detecting some kind of radiation (which at the same time are exactly the kinds of TRNGs that are truly random according to current understanding of physics, not only practically impossible to predict) you are on the order of one bit of entropy per 1024bits of output, not 1000.
That is an overkill. Measuring time between geiger detector events with 555-like counter is okay with me, it's still simple enough to be fully auditable and the bias is not so tragic.
