The number of weak classes of elliptic curve would have to be gargantuan for this specific search to produce some. If that many curves are bad, then ECC was a mistake.

drand48() could be one of hundreds of methods that were tried to produce specific values with plausible deniability and happened to produce them. The other searches were discarded.

Then why not turn this around and say which (hopefully small set of) specific classes of curves are known to be avoided, but otherwise have a free for all?

> If that many curves are bad, then ECC was a mistake.

I mean that is the logical conclusion from the behaviour around this approach where a few good things are effectively endorsed without justification.

The fact is any application of an algorithm that involves so much "trust me bro" on the selection of what are a large number of opaque quasi random but not quite or provably so numbers only has as much trust in it as you have in the people that created it.