I think most anything is possible, if we expand our thinking on the subject. The thing that limits us is our own thinking, sometimes. The annals of history are full of scientists trying to "catch" a bolt of lightning, to examine it, to try to harness it, to put it to use for mankind. Although current technology does not exist, that does not mean it could not be explored and developed for the future.
As much thought you've given on the topic, and your will to help the world is admirable. But lightening can't be used for harnessing electricity because:
1. Thunder or lightening is irregular or not in a fixed pattern. It's not a reliable or a stable source.
2. The electricity received by such is one shot- it will not produce enough electricity (and that is the best case perfect world scenario).
3. The machinery involved cannot work fast enough to keep up with the storm.
4. The alternative sources of electricity work on the principle of converting mechanical energy into electric energy. Electricity cannot produce any mechanical effect.
5. Lightening only produces current, whereas we also require voltage for working electricity.