Yes, you did miss the point. The parable is describing Jesus calling upon His disciples to wait, for although He will return to the earth, to rule over it as Messiah, it may be a considerable period of time before this happens. Our text implies that there will be a wait. History confirms this, for the church has been waiting nearly 2,000 years for His return. His prophets that are waiting in Luke are not dead yet! Unless you have scripture that backs that up.
No, I did not miss the point. I'm not sure why you are mentioning waiting for Jesus' return and that those being spoken of in Luke are not dead, as they are very much part of the point. I'm not sure why you're not understanding this.
Look at the context of what Jesus is saying:
Luk 12:40 You also must be ready, for the Son of Man is coming at an hour you do not expect."
Luk 12:41 Peter said, "Lord, are you telling this parable for us or for all?"
Luk 12:42 And the Lord said, "Who then is the faithful and wise manager, whom his master will set over his household, to give them their portion of food at the proper time?
Luk 12:43 Blessed is that servant whom his master will find so doing when he comes.
Luk 12:44 Truly, I say to you, he will set him over all his possessions.
Luk 12:45 But if that servant says to himself, 'My master is delayed in coming,' and begins to beat the male and female servants, and to eat and drink and get drunk,
Luk 12:46 the master of that servant will come on a day when he does not expect him and at an hour he does not know, and will cut him in pieces and put him with the unfaithful.
Luk 12:47 And that servant who knew his master's will but did not get ready or act according to his will, will receive a severe beating.
Luk 12:48 But the one who did not know, and did what deserved a beating, will receive a light beating. Everyone to whom much was given, of him much will be required, and from him to whom they entrusted much, they will demand the more.
Luk 12:49 "I came to cast fire on the earth, and would that it were already kindled!
Luk 12:50 I have a baptism to be baptized with, and how great is my distress until it is accomplished! (ESV)
Jesus is very clearly using this parable to speak of himself and his return. At his return is when the punishment will be meted out. This is entirely consistent with everything the NT teaches about Jesus' return and the ensuing judgement.