Jesus never turned anyone away from healing. Communion is a sacrament - considered to be an outward sign of an inward grace. Through communion, persons may become transformed, healed, and grow in their personal walk with Christ. Emphasis on praying to God, Jesus, or the Holy Spirit in the Trinity Meaningful, inspired preaching is less important than the Communion aspect of worship. Seminarians spend much more time learning how to lead worship and sacramentals than they spend time on developing preaching skills.
Seminarians serve two years in parishes before ordination to develop pastoral and preaching skills.
Events happen in life. The Eucharist transforms into the real physical body and blood of Jesus. That's called transubstantiation. Jesus is present during the very holy and sacred time of Communion. The Eucharist transforms into the spiritual presence of Jesus.