Simply being dependable and competent makes you a pain to replace.

Don’t underestimate the slack the average worker has before being fired. Changes are you will be let go at some point based on stuff that has nothing to do with your personal competence at which point all that extra effort you put in being a stellar employee was largely pointless.

Getting a promotion sounds great, but jumping from company to company is generally the better option at which point you have again lost any befits from picking up the phone at 11pm on a Friday.