What is the economic incentive for Google and Apple not to do this? They've convinced much of the public that it's a necessary feature (moreso than SiriumXM, fo

What is the economic incentive for Google and Apple not to do this? They've convinced much of the public that it's a necessary feature (moreso than SiriumXM, for example, which also starts free then costs a lot), and better than what the manufacturers can develop internally, so why allow the manufacturers to integrate it for such a low price?