Why do mobile keycards require the “Always Allow” location permissions?

The WeWork app needs to run in the background in order for Mobile Keycards to function. By selecting “Always Allow” location permissions, you are keeping the app running in the background.  If you do not want to configure “Always Allow,” you can set the location settings to “While Using the App,” though this will require you to launch the WeWork app to enable Mobile Keycard experience.