I think you might be confused why Apple exists. Apple exists to make money for its shareholders. Lightening port will bring in more revenue than USB-C. iMessa

I think you might be confused why Apple exists. Apple exists to make money for its shareholders. Lightening port will bring in more revenue than USB-C. iMessage creates social pressure for people to buy iPhones to match their friends. iMessage access to non-Apple products doesn’t increase their revenue. Apple is not an altruistic not for profit organization.