Why buying a BMW is irresponsible and selfish?

I love the beauty and power of the BMW. But, I have never been able to justify owning one myself and here's why:

1. It is a gas guzzler that is harmful to the climate and to all the societies that are exploited for energy.
2. It is expensive. Buying one diverts valuable funds from the hundreds and thousands of charitable causes around the globe.
3. Its powerful engine is wasted driving within the paltry speed limits of most roads and highways. A fuel efficient, inexpensive Honda or Toyota is good enough.

Oh, well. Selfishness is core to human nature. I'll just continue cursing every time I see a BMW owner.