> They have no ulterior motive
"Alphabet pays Apple 36% of Safari search revenue, Sundar Pichai confirms" https://www.cnbc.com/2023/11/14/google-pays-apple-36percent-...
> it's just obviously the right technical design.
Setting aside the question of motives, Safari engineers designed their content blocking system (1) without any actual experience in developing ad blocking extensions and (2) without consulting the developers who do have such experience.
Moreover, ad blocking extension developers are practically unanimous in saying that Safari content blockers are inferior and not obviously the right technical design.