I don't think they have to choose... Qualification says nothing about that, nor is that a case in any other wild card situation. Also, qualification document technically doesn't say how many wild cards can nation get.
It just seems like tripartite nations are being completely prioritized for this Olympic cycle. Remember, we had a similar situation in sailing where the tripartite quotas went to already qualified nations (instead of going to unqualified non-tripartite nations like in 2012...) And nobody assumed that Angola/Bermuda have to return something...