[smgpie]

Well, chromium the web engine is open source but it is still hard to craft a web engine with equal level of performance and other metrics, even with a team of talents.

Besides that, what you say may be true from the google's perspective. From a user(which I am) perspective, Google and Microsoft and other big corps have proven again and again with their actions that they cannot be trusted, just refer to https://www.gnu.org/proprietary/proprietary.html.