Relying on Strava’s “Privacy Zones” for months/years then using those same activities on City Strides doesn’t fare well.
That Strava setting doesn’t fit well within CityStrides because if a circle around your house/work was taken out of your LifeMap you’d end up clearly seeing exactly where you live/work. It would have the exact opposite effect.
You poss. know by now @JamesChevalier but Strava’s privacy zone doesn’t centre on the address you’re trying to conceal, it’s a random, offset zone (of a specified radius, up to 2 miles) around that location instead, and only the start and finish of an activity is hidden so you can run in and out of the zone and it be visible as part of your activity.
With this in mind, a privacy zone wouldn’t necessarily be a dead zone that pinpoints a location you’re trying to keep private.