Sure, as long as we still have options to disable their blocker and use a 3rd party one if we choose. It's astounding how many users don't bother to install an adblocker and it would be a massive improvement for those users who don't know better.
There's been more than one occasion that I've used a family member's PC and they have Firefox installed without a single extension, they didn't even know that extensions existed.
I think it's in jest, but there's a sliver of truth in it because the 3rd party apps were profitable and Reddit isn't. This is due to Reddit being incompetent rather than 3rd party apps being greedy however.
Kiwix