blhack's comment was ambiguous. Under some interpretations it is ridiculous, but under others it is sensible. By interpreting charitably, we can avoid a fair bit of two of the worst things on HN: abrasiveness and nitpicking.
(Edit: and protracted disputes. So, three of the worst things on HN.)
In context, what I am saying is pretty obviously meant to be taken as:
Failure is part of taking risk. Risk is part of doing things that are difficult. Doing things that are difficult is part of progress. Progress is something that I consider "right".
And then put further into context, with regards to spectacular failures like the one today: Don't beat yourself up [engineers who worked on orbital] because the very difficult thing that you were doing failed. That is what makes that very difficult thing noteworthy.
That is not the same as what blhack wrote, "If you're failing, you're doing something right."
you: zero failures = doing something wrong
blhack: any failure = doing something right
blhack's statement is clearly ridiculous.