And here you learn why security is often just theater (not saying a proper elliptic key is theater)...

It took less than a second to factor this key. Why not attempt, say, to factor every CA, with a budget of less than a minute each?

The reward/risk ratio is skewed so heavily in favor of trying, the only reason not to is this idea that it is "impossible".

It's clearly not, hence, the theater. Your locks don't have to work, they often only have to look like they work...