"It should be the last thought" may be acceptable when you're figuring out what you believe in, but surely not when you're running for office or forming a political organization.
Right and Left which are just two sides is way too narrow view of the world.
But I do understand why though. The people weren't even ready for Bernie Sanders this election. I found him as the better candidate among the lot, with a better plan. So adding the "centre" or "centre-left" party maybe way too much.
But I think the file-sharing/pirate party movement is a lil way too late. At the peak of Pirate Bay, they really were revolutionaries giving chances to new artists and new ideas through their front page campaigns and what not. But we have bigger problems like climate-change right now. File sharing would be not in my priority list in the current political environment.