A society with limited resources/etc will support an untested technology with only symbolic value just fine if it's cheap enough.
And RAMA just pointed out it can be quite cheap - for a society that has colonised its solar system (a very probable step for an intelligent/technological species - we're on the verge of doing it).
BTW, humans do have an exploratory imperative; that's why we don't presently live in a cave in Africa.
That is to say, a fraction of humanity always desired/desires to explore, seek its fortunes beyond the next hill, the next horizon. As for the rest of humanity: in the long term, it becomes irrelevant - just ask those half-monkeys who died in that cave in Africa after their betters left.