Check again. Our Lord says that those who reject those he sends reject him. Those he send are the apostles. The office of the apostles continues after their death in those we now call bishops.
Also, the passages on the Eucharist show the need to eat his flesh and drink his blood as he latter instituted under the forms of bread and wine at the Last Supper; a very Catholic teaching.
You're playing pretty loose and dangerous with scripture my friend. Firstly, Jesus was talking to the 72 missionaries, not just the apostles. Secondly, there is nothing in the text that indicates Jesus sent them as a hierarchy to be recognized but messengers to go before Him.
Additionally, if your claim were true then it invalidates quite a few other portions of scripture talking about salvation. So clearly your interpretation can't be correct because Jesus would not contradict the rest of His Word. Here is one of the passages you'd have abrogated by your interpretation...
John 5:24 "Truly, truly, I say to you, whoever hears my word and believes him who sent me has eternal life. He does not come into judgment, but has passed from death to life.
Jesus laid salvation on hearing his word and believing God for eternal life. Nothing there about any Roman hierarchy.