Step 1: Google finds a large number of competitors who are doing pretty well playing by their rules. Google finds some trait they all have in common. Google then modifies their own ads to not have that trait.
Step 2: Google declares the given trait "not meeting the Better Ads standard", "clarifies" the standard (or their implementation of it), and blocks all their competitors ads. Their own ads of course are still meeting the new set of rules, as they knew the change was coming. If the Coalition for Better Ads disagrees or won't be bullied by the Goliath of advertising, Google will go form their own version of it claiming to be more strict, "for the sake of the users".
Step 3: After a few weeks or months, the competition will modify their ads and eventually everything will be back to normal. That's when Google goes back to step 1.
The final Step 4 is the opposite. Find a trait that none or few competitors have in their ads but would potentially increase click-through rates. Modify the rules to say that doing this thing is okay, and oh hey Google ads are doing that thing as of right now.
Why all of this? Because Amazon is growing in the advertising business and is ruthless. "Your margin is my opportunity". So Google needs an arsenal of dirty tricks up their sleeve.
Do I really believe this is the plan? No. I think Google are legit trying to meet a user need that exists. But I also know they're a publicly traded company with growing competition in a fierce industry. It's not what they plan to do that worries me, but what they can do when up against the wall.