You are changing the topic to expelling/df-ing which Jesus doesn't address in that scripture. it is covered by these.
2 Thessalonians 3:6
In the name of the Lord Jesus Christ, we command you, brothers, to keep away from every brother who is idle and does not live according to the teaching you received from us.
I urge you, brothers, to watch out for those who cause divisions and put obstacles in your way that are contrary to the teaching you have learned. Keepaway from them.
1 Corinthians 5:11
But now I am writing you that you must not associate with anyone who calls himself a brother but is sexually immoral or greedy, an idolater or a slanderer, a drunkard or a swindler. With such a man do not even eat.
2 Thessalonians 3:14
If anyone does not obey our instruction in this letter, take special note of him. Do not associate with him, in order that he may feel ashamed.
If you cannot see the point to Jesus not healing much were people not believing/having faith in him and his father Jehovah then I am surprised. We as Christians have a commitment to the flock first and Jesus showed this.