[mlizzy]

Can you honestly say that many nominal Catholics who receive Eucharist(even after going to confession) but then live their daily lives much like non Christians do in sinful fashion have actually received Christ via the Eucharist they took?

Nominal Catholics are not usually found in the confessional lines (unless they're interested in becoming stronger in their faith); that's what lends to their lukewarmness.

All the evil in the world can be attributed to lukewarm Catholics. -Pope St. Pius V

1395 By the same charity that it enkindles in us, the Eucharist preserves us from future mortal sins. The more we share the life of Christ and progress in his friendship, the more difficult it is to break away from him by mortal sin. The Eucharist is not ordered to the forgiveness of mortal sins - that is proper to the sacrament of Reconciliation. The Eucharist is properly the sacrament of those who are in full communion with the Church. -CCC

[Elsie]

...the Eucharist preserves us from future mortal sins.

Oh?

A rational person would conclude, "Well; I don't have to do THAT any more!"