I agree with your view. If I had something that valuable it would be a moving target and parked hopefully in a garage so that it would not be targeted. I would still use it but not park in edgy areas. My 11 year old fast depreciating Boxster can be readily replaced. I dont worry much about it. Drive it anywhere, anytime, park it anywhere.
Yes I agree Porsches are hard to find especially driving. Air cooled 911's are a collector's item.