1 Co 12 is about our needing one another. It's not disqualifying people from higher gifts. Paul concludes this, by saying earnestly desire the higher spiritual gifts. The focus of this is that we understand that is the Lord who is behind it all. People take these Scriptures and say well I don't do it, so God must not have it for me. But these Scriptures are an invitation for us. Not a disqualification. But this must be done from a place of both pursuing love and earnestly desiring gifts.
It's similar to saying, are all mechanics, are all lawyers? No, they are not, but it's merely a focus and a passion. Not that all can't do it. Why would Paul says desire something that God won't give us? He doesn't ever say, well sorry, if you don't have it... suck it up. But that's what some people can take these Scriptures to mean. And they don't. Their focus is there is ONE Lord and many manifestations and gifts of Him.