What's hostile about it? You can get to the other side without ever having to wait for the cars to stop and you don't even need to walk up the stairs because there's an escalator.
As a rule of thumb, any overpass or underpass is any or all of the following:
- hostile design for pedestrians (majority)
- money sink / expensive to build and maintain
- architect's wet dream / resume building
- only looks nice on paper / rendering, but in the real world, at 1:1 scale it is ugly and makes the city look ugly