I think it depends on the individual. Some people let themselves be restricted by other people, like parents, family, other cultural things like some sort of responsibility maybe. Yes, if one feel they can shake off these responsibilites they can, others not so much. From the perspective from the ones who are not restricted by such things it may seem like a cop out (and maybe sometimes it really is).
This is not even the real life. In t he future, perfection will be achieved and the perfect life. Man and woman reconnected to the earth and the animals. The meek shall inherit the earth and live forever upon it.
it is perfectly possible, just in another solar system. there are several in our own galaxy which have planets that are suitable. this earth is by no means the only "the world". its the only one in our solar system. there are billions of other solar systems though. many, possibly even a majority, have at least on planet in its 'goldy locks zone' on which sentient, even sapient life, has indiependently evolved. and while all flesh may be prone to error, not all are prone to the same error