Also if one takes character patterns (which words are) and attach other characteristics, such as number of occurrences of individual characters or use ascii numbering to convert to numbers, then these character patterns (aka words) might be simpler to memorise.
Meaning is only necessary if you intend to speak the language.
If you're applying mnemonics to remember things then the act of doing so also takes time and energy. The issue here is the volume of information in the stated time span.
Just a pity that there are so many regular humans.
Also Nigel Richards probably doesn’t spend much time watching Netflix or shopping on Amazon. Probably very much focussed on scrambling.
A world where one in eight billion binge watches Netflix would truly be an interesting world!
If you don't actually know the meanings of the words, they may as well be random. What do you have to remember them by if you have no meaning to attach to them?
It's not even an insane feat. It's inhuman.