I find the casual way people flagellate others for having a healthy work/life balance to be concerning. If your boss is happy with your output, then it doesn't

I find the casual way people flagellate others for having a healthy work/life balance to be concerning. If your boss is happy with your output, then it doesn't matter how many hours you work to make that happen. You are paid to produce a result, not to warm a seat for 40 hours a week. I'm sure you will have all sorts of mental justifications for why that's unreasonable or why others should be working themselves to death for nobody's benefit but their boss's, but that's how it is.