i know you are wrong because it takes over 3 days on a 12 core processor to just get 5 letters in a vanity generator... and 12 words is equal to 25 Bech32 characters, and i just gave you a reasonable estimate of what it takes to generate a key with only 5 out of 25 characters... this is equal to 2 and a bit words

3 days to get 2 and a bit words, and each subsequent word is going to take about the square of that amount of time again, you'll be surprised that turns out to be more than 100 years