I see this quite a lot myself. During one of the big storms last winter, trees fell on every house on my street except mine. It's not that I don't have lots of big trees, I just cleaned them up - took out the dead wood and thinned them a bit. I also applied mycorhizal fungi to the soil and did some aeration. It cost me about 3 days of work on a dozen firs, but saved me tens of thousands. This cobblers children don't go barefoot!
chuckys blowdown in another thread reminded me i wanted to post some pics of a job i bid last week. my buddy in these pics is over 6 feet tall for perspective. some of these are the same tree from different angles but they had 10 go down. i think this is just 3 or 4 of the trees. they had a pole with 3 transformers land in the back of a pick up!