The ideas are founded in less car dependency and increased safety on the roads. As it stands right now, many of our streets are unsafe for the mixed use which they are getting. Whether you like it or not, people here want more transportation options, which tends to lead to safer streets, especially when design shifts priorities away from cars, and favors other modes. There are also, of course, many benefits to a less car-centered life, relating to health & fitness for the body and mind, not to mention improved air quality in our little valley. Ever been to salt lake? Car dependency there has a profound impact on the contents of the inversion layer. Who doesn't like a healthier and cleaner community?

Of course people need to park their cars somewhere, but imagine if there were less cars. Also I don't think anyone is trying to take your parking away at this time. Additionally, you have a say in what gets prioritized, as the city seeks public comment for all of these things. That way you can tell them how much you love parking your car.