In real life, situations where two breweries are connected somehow to a place definitely exist, joint tap-rooms for example etc. And right now, we can’t reflect that properly - only having to pick one, which isn’t great. So… we kinda “need” that ability. Should be useful for people visiting those places etc.
An example from the UK: https://www.ratebeer.com/p/experiment-pressure-drop-verdant/81216/