James Edwards on Mark 2:17: … it is as senseless for Jesus to shun tax collectors and sinners as for a doctor to shun the sick. The grace of God extends to and overcomes the worst forms of human depravity. Ironically, in one sense great sinners stand closer to God than those who think themselves righteous, for sinners are more aware of their need of the transforming grace of God. “Where sin increased, grace increased all the more” (Rom 5:20).
— Edwards, J. R. (2002). The Gospel according to Mark. The Pillar New Testament commentary (86). Grand Rapids, Mich; Leicester, England: Eerdmans; Apollos.