They fire the employee.
I'm not a manager, but I know someone at a startup who, completely within their rights, complained to state regulators when the company's payroll became erratic. Next thing you know, she was out the door.
(In the state in question, filing a formal complaint requires the complainant to give their real name and address, etc... and the employer gets a copy of the form with the letter of inquiry from the state.)
Drinking the cool-aid is generally enforced.
I remember working with some Swedes, who brought with them the (to engineers and fellow europeans) refreshing northern honesty/cynicism. Well...suddenly, after a trip to South East Asia to talk to our outsourcers (who were, er, "less than 100% effective") he suddenly started gushing in the typical corporate speak about how amazing and wonderful everything was. All the engineers wondered what had happened to him.
Two weeks later he was promoted to director.
If you pushed a bug to prod, knocked out all of Australia, then went home and aren't answering your phone because it's after hours and you're not on call, I'm not going to be happy with you. (Not that we would normally push to prod right before going home, but to illustrate the point...)
If you work 9-5, M-F, never cause any fires, and hit your milestones, then I'm perfectly satisfied with that.
That's just me, though; I intentionally maintain a relatively balanced workplace. Other companies and managers will have different styles. That being said, don't underestimate the importance of likeability [0]; you'll be fighting against human nature and unconscious biases if you do. How that manifests (general friendliness, going to after-hours social events, helping others with tough tasks, etc) will vary by person and team.
[0]: https://www.wsj.com/articles/why-likability-matters-more-at-...