No, these are two very separate issues,

A bug is when something breaks.

Inefficient use of blockspace is subjective until something actually breaks.

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I wasn't saying all unintended behavior is a bug, just that these things are "alike" and disagreeing with the idea that everything which is permitted by the code is fine.

I wasn't even criticizing inefficient use of block space. In the case of ordinals I think we can rightly call them a complete waste of block space which is obviously worse.