No one’s defending it.
You asked how we’re making this campaign playable without custom campaign feature and I answered your question. Everyone’s just talking about how to get it to work.
Is it unacceptable that Reforged doesn’t have Custom Campaigns? Sure! But if you can’t be assed to load a few maps then it isn’t anyone else’s problem, just your own. It isn’t our fault you can’t load maps without a custom campaign feature.