> We only merge code that is ready to go live.

In their perception, is the rest of tech industry gambling in every pull request that some untested code would work in production?

I work at a large company. We extensively test code on local machines. Then dev test environments. Then small roll out to just a few data centers in prod bed. Run small scale online flight experiments. Then roll out to the rest of prod bed.

And I've seen code fail in each of the stages, no matter how extensively we tested and robustly code ran in prior stages.