Great way to avoid extreme weather... if you're part of the working class. Most of these pedways are private property acting as a public space, so any undesirables can be ejected.
We need to stop the privatization of our public spaces.
Most private underground pedestrian tunnels are basements of existing buildings. Do you think the government should be using tax payer money to be cease/buy basements instead? Seems like a really odd use of resources just to not be able to kick out people who aren’t using the path for the intend purpose… but more so: Seems like something most local governments in North America would be too inefficient to handle without it turning into a project that takes 50 years and millions of dollars to complete 1 mile.
Usually the primary complaint about making them private, is that coordinating wayfinding for a bunch of private rights of way is very difficult, so what may be a complete network can be hard to use as such. Some landlords may not want you to realize you can go to a different property a few blocks away to complete your needs.
From @smallmouth's message below ("filthy dirty mess in disrepair and reeking of powerful weed, and fresh human feces and urine.") it sounds like you should be a lot happier now.
We need to stop the privatization of our public spaces.