It's unclear whether the government actually have the ability to read/intercept e2e messages, or merely declared they have the right to. That's an important distinction, because the government can declare it has the right to access such messages, without the service providers (ie. whatsapp) being able to follow through with it. We've seen something similar in uk, where a bill passed a few years ago gave the government the right to access encrypted data, and forced tech companies to provide access, but Apple didn't actually implement a backdoor. They instead decided to (very loudly) disable encryption entirely for the uk market.