it’s an acronym (as opposed to initialisms, which are not pronounced as a single word). There is no rule on pronunciation.
scuba nato laser
We don’t do this for any other acronym. There is no rule about the pronunciation. It’s arbitrary. The creator chose “jif”, so that’s the “canonical” one.
Modern cpus actually do have trng hardware built in. So yes, modern computers can create numbers out of nothing, because they have specialized hardware to do so