Borders must be abolished to prevent the continued genocide of migrants & immigrants, not to aid in our capacity to serve as cannon fodder in the capitalist labor market (death machine)
Plus, no human created the Earth, so why should we be able to place arbitrary boundaries upon entire regions of it and restrict others from crossing them based solely on their having been born in a different closed-off region of it?
There is no moral or logical argument in favor of anything but moving towards global freedom of movement one day.
I would move to a walkable city right fucking now. Right now. I can get the basic healthy lifestyle I want anywhere in the world except here in the USA.