It is interesting that while John tells us that our Lord Jesus did so much that all the books could not contain them, he chose these specific events to record so that we might believe in our Lord Jesus. It is worth asking why John chose each event or miracle to make his point.
I cannot accept that John did the choosing regarding which representative miracles to record. Since I believe this gospel contains the words of God Himself, I believe He did the choosing and the record is for the purpose of producing believers in Jesus the Christ, King of Kings and Lord of Lords.
Jesus saw fit to give us some examples that displayed the glory of God, that is, the miracles were for the purpose of giving glory to God, with any healings, etc., as secondary benefits.
He was giving us a foretaste of what conditions will be like in the Kingdom of God.