You're also welcome not to buy a phone for your parents. It would be disingenuous for me to suggest you actually do so, because we all make choices under duress or with limited options.
If this bad law were to cross the Atlantic I would still buy my parents their phones and deal with the situation.
I’m glad I don’t have to while it remains outside the US. And I’m glad I don’t have to deal with it on my own phone, even if I’m better equipped to deal with it. And I’m glad people are still free to change to different browser engines inside the US without the law.
I'm really sorry that your emotional wellbeing is predicated on the exploitative practice of a multinational company. You should have seen this coming. Bell Telephone didn't get away from litigation for "securing" telecommunications infrastructure under one body. Microsoft didn't foil antitrust litigation for "protecting" users from third-party browsers.
Expecting Apple to escape broader antitrust scrutiny is a pipe dream. You should probably plan accordingly.