I can't tell if you're really asking, so I'll answer as if you are: learning these things brings greater understanding and greater understanding brings advance

I can't tell if you're really asking, so I'll answer as if you are: learning these things brings greater understanding and greater understanding brings advances in multiple fields. the most fundamental questions are going to be answered (or at least conceived of and worked on) first. answering the most fundamental questions often brings the largest leaps in understanding as well, which is why untouchable numbers are considered more notable than "numbers which can be expressed as the sum of 17 primes", and so on.