[Scarblac]

It's saying, you have an extremely important job for the functioning of the Internet, that everybody has to blindly trust you do right.

The moment we see a small sign that you don't do it right in some detail, then that trust is gone.

Consider all the details in the spec to be Van Halen's brown M&Ms (although that had no functional effect, and losing a bit of security does). They knew that if people did that right, then they could trust that they also read the details of the rest. If Google gets this wrong, we can't trust on that.

That's not a slippery slope argument. That'd say, if we allow this then you would then do worse things because we let it go. But that's not the argument.