Yes, you feel like you are wasting your time and are useless to the society most of the time with an office job, ngl. But having free time and getting payed for it, compensates a bit those feelings.
I studying at the same time to have a degree and after that, I'll try to do something useful with my life. It gets boring over time when nothing changes if you work for 8 hours, or if you play games and check your mails every 15 minutes to ignore them for the day if it's not going to get you in trouble. I work for a big company, I don't care if they make money or no, but at the same time everyone likes to feel useful and not waste 80% of your life in acting like you are busy.