Working 2.5 hours per day is enough for me some days to meet expectations.
If the person you work for is happy about your output, then should you care ?
If you’re okay working to such low expectations, and do not fear being replaced by automation, then that’s your prerogative.
I would not feel secure in the stability of such an easy job, nor proud of my accomplishments. I also expect that we work in very different stratums in both skill and renumeration.
If I only dedicate 2.5 hours every day to my work, I’m not meeting that obligation.
If I start accounting for my showers and commute as working hours, I’m being dishonest with both myself and my employer.