A few things i don't get about your proposals and reasoning.
Firstly, what is this "right to life"? That phrase means nothing to me. They lived a life and they died. They don't miss life, the dead don't have feelings or regrets, there's no concept that they're upset at being dead and desperately want to live again. The only reason to bring people back to life would be for our benefit, because we miss them or we think they had interesting minds, don't try and make it about them, it's entirely selfish.
If you really measure the quality of a civilisation by how many "people" it has alive then it will be much much easier to create entirely new digital people who will have all the traits of humans. This method doesn't involve the most likely impossible method you described.
As for the scientific research into the topic I think you misunderstand how research works. You research things in steps and you build on previous knowledge. You need at lest some vague theory of how something will work to figure out what to even start researching. long time future inventions can't just be thought of and then made if none of the technology required is even vaguely comprehended. If we do eventually discover something like you described it will be an accident based on a culmination of many different areas of science, none of which initially had any concept of this being their goal.
By that logic, it would be okay to kill a person, since they wouldn't mind being dead. There would be no reason to have charity, doctors, firefighters, police, or anyone else dedicated to preserving life. I assume that you think those things are okay to have. Well, what makes one method of saving a person's life more worthy of consideration than another? You know what? You're right. It is selfish. Humans are selfish. It all ultimately comes down to ourselves wanting to feel good, whether it's through pride, personal pleasure, alleviation of guilt, or whatever. So what? Just because I have my own interests in mind doesn't mean that I want to make the lives of everybody else a living hell.