Just like everyone is free to leave their power company and install solar panels, just like everyone can leave their water company and have water tankered in. Just like you can leave your telecom company and use satellite data.

Just because a company is providing value that doesn't mean that it shouldn't be regulated. Just because you can technically leave a service doesn't necessarily mean that you aren't realistically locked into it and that that service isn't going to exploit that fact.

Google is not essential to live. You can also use Bing or any of the numerous alternatives. It’s not the same thing at all.