Planning law is there for a reason and needs to be upheld.
Planning law as a concept, yes. Specific planning laws, and the specific judgments against them are probably for a reason in most instances, but that doesn't necessarily mean that they're justified - the reason could be as arbitrary as personal taste in some instances.
If you allow on person to build without permission and not be subject to retrospective legal action which may mean demolishing the building, then everyone will do it - as effectively you wouldn't need planning permission.
Laws are only worthwhile if you're prepared to enforce them, I'd agree. That doesn't mean that laws aren't worth challenging - planning laws do, at times, seem rather arbitrary. In this instance, though, where he didn't just ignore planning laws, but deliberately tried to evade them knowingly, I'd be inclined to rule against him not on the basis of the building or the design, but just for the pre-meditated nature of his actions.
O.