Fair enough, though it depends a bit how you define achievement. Writing is in my opinion excluded almost by definition in this debate, otherwise the question of "what have Curtis / Gruber achieved?" is a bit moot. ARC is great, I'm sure, but not changing the world (yet). Bayesian filtering is a biggie, granted.

By the way, I don't mean to imply any criticism of people doing things in that order. On the contrary, a mismatch between fame through writing and "doing" seems like a good sign that you should buy a stake in that person, if that were possible.