I don't think it's "care less" but I think it's "care appropriately for 40 hours a week."
The concept of "quiet quitting" is a shameful, panicky fraud perpetuated by the power holders in the industry that see their power slipping. "Quiet quitting" has been known as "work to rule" or "fulfilling a contract." My paystub says 40 hours. My original contract says nothing about overtime. I'm not quiet quitting, I'm doing my !@#$ing job.
By being STRICTLY limited to 40 hours, I can do my job at full strength, providing consistent results and quality. And then I'm not so burned out that I go home and do whatever I please with my life. Sometimes that's more coding for me!
My job is a side quest, not a main quest.