> Psychological safety isn't about making you happy, I'm actually a bit surprised why so many people here think it is. It's about producing positive outcomes in the form of successful projects. [...] The observation is if everyone feels comfortable disagreeing with one another, the project is more likely to succeed. That's it.

It is both.

My decision to stay or quit is a cost-benefit analysis, and feeling happy or unhappy is a part of the equation. High employee turnover usually means lower productivity, because knowledge is lost and new team members need to learn about the project from scratch.