Is it really that clear that Google has more power here? Whom would users blame if suddenly half their pages are falsely accused of being "untrusted"? Probably the browser, not LE, right?
That's not leverage that a CA can use. If half the internet suddenly displays TLS warning interstitials, it doesn't make people mad at the CA, and it doesn't make people mad at their browser: it just _trains them to ignore such warnings_. That's a bad outcome all around, and one that a CA whose core purpose is improving security for end-users cannot condone.