No, what you've done is listed a bunch of things that show that the game does and did allow for various means to create new magic items. Then you've gone ahead and claimed (and claimed that it was obvious) that in spite of all these rules which exist, that no one anywhere intended for them to be used to create a very simple item.
Did they intend for people to make feather fall clickies? How do you know?
I get you - whatever - DM has final say blah blah blah optional blah blah not everyone uses them. Show me the written citation by all members of the design team that they never intended anyone to make a command-use activated divine power item. Then I'll agree it's obvious.
Until then, your claiming that someone wrote an entire section of optional rules that they intended would never get used. More to the point, intended they would specifically not be used for a certain circumstance.
I'd agree that they didn't plan out every possible use for the rules - no one spec'd out every possible item. That's a far cry from "intending" that the ones they didn't document should never be created and no one ever would or should.