I agree, and the point I challenge is the blog post's first:
> Lines Will Move Further Away If They Aren’t Defined
Is that necessarily a bad thing?
Sometimes I think some line is important, then I move closer to it, and realise the line is less important to me, and so I'll be less cautious of it.
Some might say "slippery slope!" or "boiling a frog!", but I think of it as me updating my values as I learn more.
Some people are prone to black-and-white thinking, and so I can see why they might be drawn to hard lines.