The "fuck 'em" attitude would be great if it were sustainable, but it's not. You can't keep living like a teenager when you're in your 40s. Want to have kids? Then, you need to own your house (it's good for their self-esteem and has measurable effects on their social and academic success to own the house they live in) and get them into good schools and make sure they have the opportunities (intellectual, athletic, creative, occupational) that will socialize them well and provide them with the connections to have a decent shot of actually achieving something instead of just being some entitled guy's pawn. Otherwise, you're just generating middle-grade meat for society to munch on. So kids are super-expensive, but you can't really have them at age 60, and you better have laid your groundwork (career-wise) for many years before you make that decision.
It makes me sick to read this bad advice that tells people they can just do what they want and that society will accept them for being unique, wonderful snowflakes. Or "do what you love and the money will follow". It's total bullshit. People generally suck and are mean-spirited and vindictive, and this idea that society will catch and nurture those who indulge themselves in a gap or two is ridiculous. You know what happens (if you're not rich and well-connected) to your career if you travel for 2 years after school? People resent the fuck out of you (because they didn't have or take that opportunity) and ding you for that alone. Six months of leisure travel when young is, for this reason, somewhat more of a liability than that amount of regular unemployment (which, post-2008, makes you look more unlucky than incompetent).
What you actually need to do is figure out what matters, what to care about, and how much. For example, you should care about your job well enough to do it well and get promotions. You should not care about it so much that you get into conflicts that damage your career. You should care about your success in the company (and in your career) but not about big-picture company-wide issues over which you have no influence. (Pay attention to these, because they may be relevant to your career, but don't get emotionally involved or take stupid risks, even when those risks benefit the company, because you won't give a shit about "good for the company" if you get fired.) You can't take a "fuck 'em" attitude or get a chip on your shoulder, but blind obedience to managerial authority is going to lead to mediocrity and misery and, in the long run, anomie. Somewhere between "yes, sir" douchebaggery and "fuck 'em" is the right attitude-- the "middle path".