> if you are experienced enough to deeply understand the reason for it, you will know when it does or does not apply.

You wont have that experience (or use it really) if you stop at your first system!

Seriously though, I agree, it's by definition that adages reveal truth. This one just feels so pessimistic and boring.

My version of this would be "the third system is the best one". Make it once, learn the space and the limitations of your solution. Make it second time, learn what isn't useful. Make it just right on the third try!