The PI shoe you linked, as well as most all of PI's 'X Alp' shoes are good for walking.
I have the pearl izumi x alp drift iii and its comfortable to use riding, walking, and even jogging around on a soccer field or playing driveway basketball with kids. <---done both multiple times in them.
Yes yes, any SPD shoe isnt a hiking shoe and the shoe mechanism shouldnt be abused. That disclaimer aside, the X Alp series is really diverse and there is certainly something within the line that would work for casual trail hikes.