Tbf last I checked Talos is umblee's superior, and he basically feeds off her portfolio anyway.
But not being able to worship Umberlee herself who's worship is a very big part of Baldur's Gate city would really suck. It doesn't matter that he is her superior, it's her temple that exists in Baldur's Gate and therefore has big influence there. Would be a shame to not have her available as a diety given how integral she is to the city.
