"Why is it that the physical form is fought for in the end ?"
That is because, the Universe needs new information. You can not produce that without the physical form for life, planets, stars etc. That is how it is designed (who...I am too young to know). Our spirit side has high knowledge as you grow and maintain full memory and logic. For example, in the last civilization some of us worked on Space Fairing areas and have the right ideas when needed.
That is because, NASA and others are trying to develop the warp system. That means, when you are on the space ship, and travelling, you will be blind to the outside world due to folded space. When to rich somewhere, you do not sometimes know where you are and when you stop, you may be inside a sun or planet or whatever....if everything is not correct. Stuff like that. Also, because you have to have NEW information, you do not get spirit lives connect to you very easily, until your society understands it....anyway, that is the answer...new knowledge...