> Why is high caloric density important if you work in an office

Because I do not work in an office :-) And sometimes I use to chop woods for heating myself.

I chop wood and don’t eat meat. When I’m playing tennis, I consume lots of calories to provide the energy to compete. I don’t see how your conclusion that eating lots of meat every day is necessary when you sometimes don’t work in an office and sometimes chop wood logically follows.

This is just my anecdotal evidence. I can not feel good at that times when I do not work in the office (my non-office job is welding which is sometimes better to perform not in building to prevent breathing with chemicals). I tried a lot of really strange things like consume more than 1kg of sugar per day or to drink a sunflower oil to get rid of hunger quickly, but nothing can replace meat for me, especially in cold part of year, which in my home has already started. Either I eat meat at least 2 times per day or I feel hungry and perform a poor quantity of results.