The author's point here is great, but the post does (imho) a poor job illustrating it.
The tl;dr on this is: stop sprinkling guards and if statements all over your codebase. Convert (parse) the data into truthful objects/structs/containers at the perimieter. The goal is to do that work at the boundaries of your system, so that inside of your system you can stop worrying about it and trust the value objects you have.
I think my hangup here is on the use of terms parse vs validate. They are not the right terms to describe this.
The tl;dr on this is: stop sprinkling guards and if statements all over your codebase. Convert (parse) the data into truthful objects/structs/containers at the perimieter. The goal is to do that work at the boundaries of your system, so that inside of your system you can stop worrying about it and trust the value objects you have.
I think my hangup here is on the use of terms parse vs validate. They are not the right terms to describe this.