Since when does HN need mathematical rigor for hypotheses? I have never seen this standard applied to blog posts about how to be a leader, pitching your ideas,

Since when does HN need mathematical rigor for hypotheses? I have never seen this standard applied to blog posts about how to be a leader, pitching your ideas, how to program, etc. All of which usually don't come with the statistical proof with which they should come if they want to make a scientific claim... It's all just insights and thoughts.