Again, do we know that this prime matter exists? is it just another theory like dark matter?<quoted text>
The theory makes sense considering hydrogen is the lightest and simplest element and the most abundant in the universe. Hydrogen bond is critical in overall stability of DNA. So it's a key to life creation.
"Hydrogen is a chemical element. Its atomic number is 1, which makes it the simplest, known element in the entire universe. Hydrogen is the true primordial substance, the first atom produced after the big bang. All chemical elements were formed from hydrogen by the processes of nuclear fusion." - wiki
Most things i have read suggest that hydrogen was not the only element to come out of the cooling universe. other light elements were there also.