> I just don’t understand why product market fit isn’t established and revenue found before launching — these failures seem to elementary to avoid.

You can ask that question of the entire tech industry.

The answer is pretty straightforward: Because being a normal financially solvent business is not good enough. A simple technical improvement is not good enough.

Pichai needs another trillion dollars added to Google's market cap, or it's not good enough.

(And VC has the same problem, all of tech is broken.)