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You are misunderstanding the relationship of things in LVM.
Essentially you build by:
pvcreate ---> vgcreate --->lvcreate
You are trying to undo the top of that flow and wondering why the the middle doesn't realize you did it. The fact is it WILL "realize" it by giving you an error once you try to use the deallocated extents on the PV. Until then it has no reason to assume you've done something foolish.
You choose to do things the wrong way and then proclaim it a bug that it doesn't immediately make you pay for the mistake. It would be a bit like building your house on a beach that is being eroded by wave action. The house is still a house until that critical moment you need to rely on the part of the foundation that is now sitting on nothing solid. This is something that doesn't occur instantaneously just because some of the foundation is missing but rather at the point when something puts pressure on that missing foundation.