I don't see any need to defend myself. My choices are mine and this is my life, that's all the defense I'll ever need. Other people are free to do whatever they want to but to position things as though 'apple or android' are the only choices available to me does simply not seem correct. Yes, I'm sure the percentage of tech people without a smartphone is low but outside the tech scene there are still plenty of people without smartphones.
P.S. People often made fun of me for carrying the dumb phone. I'd always quip, "I'm too smart to use a smart phone." Feel free to use that quote when defending yourself ;)