No they wouldn't because of the power dynamic. That's exactly where the government comes in. Google (and the associated OEMs) and Apple have together far more bargaining power than most customers together. Your lobbying power is 0 and even with massive coordination efforts it's hard to compound that 0 into something measurable without serious help from the government.

You need a mobile phone and you have very few choices. How exactly are you protesting? By shooting yourself in the foot and not getting a phone? By going to boutique manufacturers who can barely supply 1% of the market?

Your reasoning is good on paper but not realistic. I'll say it again, the reason you don't have asbestos in your walls or lead in the air (from fuel) isn't because you voted with your wallet but because governments did their part. That should be evidence enough that your assumption is wildly idealistic.