Google, first and foremost, is an advertising company. Their main business are ads and everything else revolves around creating products that attract users to use their services so they be monetized using their ad platform.
The whole purpose being Google's "ad blocker" is to protect their advertising business. They know that ads are starting to annoy a lot of people so they're going to ban worst offenders and try to stop users from installing an actual ad blocker that blocks all ads.
Apple is not an advertising company and they care about their end users and want them to buy their devices. Providing an unobtrusive and private browsing experience is what they care about.
The whole purpose being Google's "ad blocker" is to protect their advertising business. They know that ads are starting to annoy a lot of people so they're going to ban worst offenders and try to stop users from installing an actual ad blocker that blocks all ads.
Apple is not an advertising company and they care about their end users and want them to buy their devices. Providing an unobtrusive and private browsing experience is what they care about.