Should I still keep my Canon 18-55mm kit lens if I have a 50mm stm 1.8 lens?

So i mostly shoot portraits with my Canon T6i and from my research the 50mm prime lens will always produce better pictures for that purpose. So is it even still worth keeping the kit lens? I mean I hear it is pretty decent for video while I havent heard much for the 50mm’s video capabilites.
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