Comment by drngdds

I feel like there's a simpler explanation that's still not 'good intentions':

1. Lots of people are using adblockers to block all ads, including Google's, and they don't like that.

2. People mostly install adblockers to block really annoying ads.*

3. By building in an adblocker that blocks annoying ads, people will stop installing full adblockers that also block Google's ads.

*There are real issues with non-annoying ads, like tracking, but I don't think most people know or care very much about that.