Ever heard the saying "if one guy is an asshole, he's an asshole. If everyone is an asshole, you're the asshole"?

Not saying you're an asshole, but that is to say you're the only one defending your viewpoint, and you are welcome to it. But we'd all appreciate consideration of the information as opposed to the offense you seem to be taking.

Nuance exists everywhere in our complicated world.

The example that springs to mind is when we discovered that Archimedes invented the foundations of calculus long before Newton and Leibniz. The argument typically goes that the foundations of mathematics would be much further along had this discovery been realized but many others argue that we would have had no practical way to apply it in the time that Archimedes lived.

Now the part that I think you are missing is that the interesting part is not only that we now know that a new number is prime, but that knowing that a number is prime involves verifying that a number is prime and the larger the number is, the more difficult it is to verify so this almost always involves landmark advances in math and computing. Especially since prime numbers are distributed asymptotically meaning they are typically a few orders of magnitude larger than the previous one.