By building a new engine, we can increase ecosystem diversity and put all these open standards to the test. We regularly find, report, and sometimes even fix bugs in the various web standards - stuff we find just by being the first to try and implement everything from scratch in a long time!
We also believe it’s good for the world to have more engines that aren’t directly or indirectly funded primarily by the advertising industry.
No? There are tons of valuable contributions, pure and applied, that "people" (markets) do not pay for at all, or pay pittance relative to their usefulness.
Here's a tweet with a couple of diagrams that illustrate how much control Google has over all browsers (including Firefox and Safari): https://x.com/awesomekling/status/1793937129250214344