Under these circumstances, it is appropriate to ask who is the customer. Then presume that the company is trying its best to make the customer happy.
Apple has clearly defined that the customer for the "default search engine selection" option is Google and not the users. There is obviously some mediation by regulators in Europe and elsewhere (hence Google's major competitors being included on the list), but the customer is Google. I think that from that fact flows two further inferences:
A) the customer might not want to write down everything, or even communicate in any non-deniable way, all of their preferences (due to those regulators), but can presume that Apple understands their preferences
B) The customer is happy to the tune of 20 billion dollars with the current set-up.
Apple has clearly defined that the customer for the "default search engine selection" option is Google and not the users. There is obviously some mediation by regulators in Europe and elsewhere (hence Google's major competitors being included on the list), but the customer is Google. I think that from that fact flows two further inferences: A) the customer might not want to write down everything, or even communicate in any non-deniable way, all of their preferences (due to those regulators), but can presume that Apple understands their preferences B) The customer is happy to the tune of 20 billion dollars with the current set-up.