How's that weird? It is perfect anecdotal counter-evidence to the claim it's responding to.

I interpreted the original claim as being:

> There's really no reason to think the person turning the bolt necessarily knows what size the bolt needs to be.

and also steel-manned the final sentence like this:

> In the same way a web dev doesn't need to know how docker works

As such, the (claimed) existence of one person who regularly uses very different skills doesn't disprove what I think jacobsenscott was trying to say.

Sure, but there's no reason to believe the person turning the bolt necessarily doesn't know what size it needs to be.

Example using the same logic as the post we're discussing: Someone flips a coin in another room. It doesn't necessarily have to be heads, so we should assume it's tails.