[tonyvince7]

The HN replies are more of an encouraging nature where as the reddit replies are more "how to stop the tunnelling". What explains this?

[Adraghast]

The typical HN user is very hostile to the idea of someone telling them they can’t or shouldn’t do something.

[maxk42]

Content moderation. Moderation creates the culture of online communities by reinforcing or diminishing certain behaviors. Not all communities have great cultures.