Answer:
The idealistic approach is more valuable in the long-term, because it not only offers solutions to present and future problems, but it also offers a vision: an idea about the future for a person, a corporation, a city, or a nation.
The practical approach is more valuable in the short-term. While long-term ideas and vision of the idealists can be fulfilled, there are many concrete problems that need to be solved in the meantime, and this is the time and place where practical people shine.
After “because,” you always want to put an explanation.
Demonstrating bravery huh? It doesn't seem too hard to explain. Say, for example your talking about a fictional story, right? Depending on what that said character does, depends on his/her bravery for he/she did. If you can implement something similar to that in whatever it was you had in mind, it might help.
I really hope this helps.
